Cool MateAllergy vs Reaction
When to use each in English, with meaning, register, and examples.
Allergy
Top 2,000 (common)
Reaction
Top 1,000 (very common)B1noun
Most common: Reaction
| Allergy | Reaction | |
|---|---|---|
| Pronunciation | 🇬🇧 //ˈæl.ə.dʒi//🇺🇸 //ˈælərdʒi// | 🇬🇧 /["/riˈækʃn/"]/🇺🇸 /["/riˈækʃn/"]/ |
| Meaning | A reaction to something that makes you sick. | How someone responds to something. |
| Example | She has an allergy to peanuts that makes her very sick. | Her reaction to the news was surprisingly calm. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | - | B1 |
| Part of speech | noun | |
| Collocations | food allergy, seasonal allergy, allergy symptoms, allergy test | extreme, strong, violent, get, have, meet with, in reaction to, reaction against, reaction to, extreme, strong, violent, get, have, meet with, in reaction to, reaction against, reaction to, adverse, bad, severe, experience, have, suffer, reaction to, fast, good, lightning, have, speed up, slow down, time, chain, chemical, nuclear, cause, initiate, produce, occur, take place, during a/the reaction, in a/the reaction, reaction between |
| Antonyms | - | inaction, apathy, indifference |
| Common mistakes | Confusing 'allergy' with 'intolerance'., Using 'allergy' as a countable noun incorrectly., Not recognizing symptoms can vary widely. | Confused with 'action' as they are opposites., Using 'reaction' without specifying what it is a reaction to., Mispronouncing it as 'rea-kshun' instead of 'ree-akshun'. |
| Usage notes | Use 'allergy' in medical or casual contexts. Avoid in formal writing unless specifically discussing health. | Used in both formal and informal contexts, but avoid in highly casual conversations. Common in discussions about emotions or scientific processes. |
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Frequently asked questions: Allergy vs Reaction
What's the difference between Allergy and Reaction?
Allergy: A reaction to something that makes you sick. Reaction: How someone responds to something.
Which is more common: Allergy and Reaction?
Reaction is the most common in everyday English.
Can you show an example of each?
Allergy: She has an allergy to peanuts that makes her very sick. Reaction: Her reaction to the news was surprisingly calm.
Can I use Allergy and Reaction interchangeably?
Not always. Allergy and Reaction are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.