Word twins that aren’t

Beware! You’ve been misusing these word pairs for years—let’s fix that

Image: Eileen Pan

You’re not the only one who thinks the English language plays tricks on us. Plenty of everyday word pairs sound like they’re interchangeable, but using the wrong one can make all the difference. You know what they say: the devil’s in the details. So today, we’re unpacking a few of those tricky duos that people tend to mix up. Buckle up for a fun little language tune-up. It’s never too late to outsmart your spellcheck.

Image: Victor G

Contrary to what you might think, negative reinforcement isn’t about scolding—it’s actually about removing something unpleasant to encourage a behavior. Punishment, on the other hand, involves adding something unpleasant to stop a behavior.

So, if you want to discourage your dog from chewing shoes, a punishment might be a firm "No!", while negative reinforcement could involve removing a leash restriction after the dog stops barking. Remember: one removes to reward, the other adds to deter.

Image: Tim Mossholder

Prejudice lives in the mind: it’s a preconceived opinion about someone based on group identity. Discrimination? That’s when you act on that opinion. For example, someone might think all redheads are hot-tempered (prejudice), but if they refuse to hire one (discrimination), that’s when it crosses the line. Both are harmful, but one’s silent, and the other speaks volumes. And we would advise against both anyway!

Image: Joeyy Lee

This one’s a classic. While race often refers to physical traits like skin color—think White, Black, or Asian—ethnicity digs deeper, encompassing culture, language, and ancestry, like Irish American, Korean, or Ashkenazi Jewish.

You can belong to the same race but be part of very different ethnic groups. For example, two people might be considered "Asian" by race but have entirely different cultures if one is from India and the other from Japan.

Image: Kelly Sikkema

Here’s a helpful distinction: disease is the malfunction; illness is the experience. Disease is what the doctor diagnoses—say, bronchitis. Illness, on the other hand, is how you feel while you’re stuck in bed binge-watching old Westerns with a box of tissues.

It’s possible to have a disease and feel just fine, or to feel ill without knowing the exact disease yet. Sociologists use this distinction to better understand how culture and emotions influence how people seek treatment. It’s why two people with the same diagnosis might cope in very different ways.

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They both feel unpleasant, that’s for sure—but anxiety and fear are not the same. Fear is your brain saying, "Danger is here!" Anxiety is your brain saying, "Something might go wrong," even if it’s just in your mind.

Fear is about an immediate, unavoidable threat. Anxiety is more like a long-term guest who overstays their welcome, even after the threat is gone. They also show up differently in your body and brain. Knowing which one you’re experiencing can help you cope more effectively.

Image: Saulo Meza

These two are emotional cousins, but most people use them interchangeably. Empathy is when you feel with someone, like you step into their shoes and walk around a bit. Sympathy is when you feel for someone, offering comfort from the outside.

Empathy connects more deeply but takes more energy; sympathy is often where people start. Both are kind, but one reaches across the table, and the other passes the tissues. Either way, we need more of both in the world, don’t you think?

Image: Ehimetalor Akhere Unuabona

Let’s clear this one up: a delusion is a belief that isn’t based in reality, while a hallucination is a perception that isn’t based in reality. Think of it this way: if someone believes the government is watching them through their TV (when it isn’t), that’s a delusion. If someone sees people in the room who aren’t there, that’s a hallucination.

One is about what’s believed to be true; the other is about what’s actually sensed. Both are serious symptoms often linked to mental health conditions, but they’re very different in nature and require different approaches to treatment.

Image: Deniz Demirci

If you’ve ever said, "I’m obsessed with crossword puzzles," you’re probably not using the clinical definition. In psychology, an obsession is an intrusive thought or image you can’t shake. A compulsion is the ritual or behavior you feel forced to do in response.

Obsessions might involve a fear of germs; compulsions might include constant handwashing. According to the DSM, compulsions follow rigid rules, while obsessions are mental intruders. They often go hand in hand, but they’re distinct players in the OCD story.

Image: Nguyen Dang Hoang Nhu

Testing is all about collecting data, scores on an IQ test, and answers on a personality inventory. Assessment is putting those puzzle pieces together to understand the person or situation as a whole.

A single test score can say something, but an assessment interprets what it means in real life. Scientists use both to theorize and come up with explanations and solutions. But confusing the two can lead to misunderstanding the process, and your results.

Image: Viktor Talashuk

These two terms are often tossed around interchangeably in movies, but they’re not the same. Psychopaths are typically cold, calculated, and harder to spot in a crowd. Sociopaths are more impulsive, emotional, and prone to erratic behavior.

What do they have in common? Both fall under the broader category of antisocial personality disorder. While the terms aren’t used as official diagnoses, they describe different shades of the same behavioral spectrum.

Beyond the stones

Hidden influence: 10 modern things we inherited from the Roman Empire

Image: Sébastien Jermer

According to history books, Rome fell more than 1,500 years ago, but it can be easily argued that the Empire's influence never truly waned. Beyond its majestic ruins, Rome left a legacy so intertwined with our modern world that we often fail to recognize how many of our daily conveniences stem from their unique vision and innovation. From public sanitation to bureaucracy, here are 10 surprising ways the Roman Empire continues to shape our lives today.

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The Julian calendar, named after Julius Caesar, forms the backbone of our modern Gregorian calendar system. While it has been modified by Pope Gregory XIII (hence the name "Gregorian"), the basic structure—365 days with leap years—remained.

Even the names of our months are derived from Roman months, which is most evident in months like July and August, which honor the early rulers Julius Caesar and Augustus. Moreover, Rome's efforts to standardize time laid the foundation for modern global timekeeping.

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Bizarrely, the standard width of modern American railways can be traced back to Roman chariot paths. These ancient roads set a standard gauge of 4 feet, 8.5 inches, which were used extensively across the empire.

Since much of the road infrastructure built in Great Britain was only improved upon by the following rulers, the same width was preserved long after the Roman Empire fell for fear of breaking the wheels of carriages, and it eventually became the basis for railroads.

Image: Robert Keane

Concrete is so ubiquitous in modern architecture that it’s hard to believe it was invented over a thousand years ago. Roman concrete, or opus caementicium, was a revolutionary formula—a mix of volcanic ash with lime and water— which produced materials so durable that they have withstood millennia.

In fact, Roman concrete may have been even stronger and more resilient than our modern version. The inclusion of calcium carbonate chunks and unique mixing techniques gave it remarkable self-healing properties, allowing the material to repair cracks over time, further enhancing its durability.

Image: Peter Herrmann

The Romans invented the hypocaust system, an early form of central heating. By circulating hot air beneath the floors and walls of public baths and homes, they ensured warmth and comfort, especially during cold winters. The system was so efficient that it could easily provide heat for hundreds of people at once.

Unfortunately, after the collapse of the Roman Empire, heating reverted to more primitive fireplaces for nearly a thousand years. However, the technology lived on and eventually became the precursor to today’s underfloor heating systems.

Image: Jan Antonin Kolar

Rome’s sanitation systems were ahead of their time, featuring flushing toilets connected to complex sewer networks like the Cloaca Maxima (amusing name, we know). These innovations helped reduce disease and improve public health, a rare luxury in ancient times.

In fact, major cities like London did not have adequate sewage systems until 1875! The city only undertook this massive engineering challenge after untreated sewage in the Thames rendered it nearly uninhabitable, which goes to show just how advanced Roman sanitation systems were.

Image: Kenny Eliason

Not even what we might consider the pinnacle of modern conveniences—fast food—is immune to Roman influence. In fact, Romans loved their street food. Thermopolia, the ancient Roman equivalent of fast-food shops, served hot meals to busy citizens on the go.

These establishments were a common sight in cities, offering quick and affordable meals. Even more, some historians suggest that they might have had burgers, or at least a similar type of meat sandwich called Isicia Omentata. This dish featured spicy minced pork seasoned with fish sauce and was often served in plain bread buns.

Image: Claudio Schwarz

Romans were no strangers to advertising. Merchants used signs, slogans, and symbols to promote their goods. Mosaics with company logos and distinctive designs served as early trademarks and have been frequently found in well-preserved archaeological sites such as Pompeii.

Hospices and inns also relied on advertising to inform travelers about their services, sometimes even noting that they served food "Roman style." Moreover, wealthy Romans often used advertising for political purposes, funding slogans to be painted on buildings or even commissioning caricatures of their political enemies.

Image: DESIGNECOLOGIST

Graffiti was everywhere in ancient Rome, from political messages to love notes. But just like in modern times, Romans frequently used graffiti humorously, sometimes leaving rude remarks, explicit drawings, or just commenting ironically on daily life.

But graffiti could also be more innocent, featuring simple pictures or even games (picture a chalk tic-tac-toe on a wall). Despite the centuries that separate us, their sense of humor was not so different from ours, and graffiti has been invaluable to historians and archaeologists in reconstructing daily life in Roman times.

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Romans didn’t just build cities—they meticulously planned them. They pioneered grid layouts with organized streets and distinct zones for residential, commercial, and public spaces. These urban planning innovations have influenced modern city design, where very similar urbanization plans are still used to build and expand.

While the city itself is not a Roman invention, of course, Roman designs shaped how we conceive of urban spaces today. Their approach to planning ensured that cities were functional, efficient, and navigable, setting a standard that continues to guide modern urban development.

Image: Maksym Kaharlytskyi

Whether you see it as a gift or a burden, there is no doubt that Roman bureaucracy has left a lasting legacy. Rome’s complex system of governance required extensive bureaucracy. And they were among the first to implement systematic and detailed record-keeping, tax collection, and legal systems.

In particular, the Roman army was highly bureaucratic; something as simple as a stock check or a food order often required paperwork in triplicate before it could be authorized! But in any case, this meticulous record-keeping is a major reason we have such detailed knowledge about Roman times today.