Cool MateAllergy vs Reaction vs Sensitivity
When to use each in English, with meaning, register, and examples.
Allergy
Top 2,000 (common)
Reaction
Top 1,000 (very common)B1noun
Sensitivity
Top 2,000 (common)C1noun
Most common: Reaction
| Allergy | Reaction | Sensitivity | |
|---|---|---|---|
| Pronunciation | 🇬🇧 //ˈæl.ə.dʒi//🇺🇸 //ˈælərdʒi// | 🇬🇧 /["/riˈækʃn/"]/🇺🇸 /["/riˈækʃn/"]/ | 🇬🇧 /["/ˌsensəˈtɪvəti/"]/🇺🇸 /["/ˌsensəˈtɪvəti/"]/ |
| Meaning | A reaction to something that makes you sick. | How someone responds to something. | The ability to understand and care about others' feelings. |
| Example | She has an allergy to peanuts that makes her very sick. | Her reaction to the news was surprisingly calm. | Her sensitivity to criticism made her an empathetic friend. |
| Register | Neutral | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) | Top 2,000 (common) |
| CEFR level | - | B1 | C1 |
| Part of speech | noun | 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 | extreme, great, high, degree, have, develop, display, training, with sensitivity, sensitivity about, sensitivity in, a lack of sensitivity, extreme, great, high, degree, have, develop, display, training, with sensitivity, sensitivity about, sensitivity in, a lack of sensitivity, extreme, great, high, degree, have, develop, display, training, with sensitivity, sensitivity about, sensitivity in, a lack of sensitivity, extreme, great, high, degree, have, develop, display, training, with sensitivity, sensitivity about, sensitivity in, a lack of sensitivity, extreme, great, high, degree, have, develop, display, training, with sensitivity, sensitivity about, sensitivity in, a lack of sensitivity, extreme, great, high, degree, have, develop, display, training, with sensitivity, sensitivity about, sensitivity in, a lack of sensitivity |
| Antonyms | - | inaction, apathy, indifference | insensitivity, indifference, apathy |
| 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'. | Confused with 'sensible' — they have different meanings., Used inappropriately in technical contexts, where it refers to devices rather than feelings., Overgeneralizing its application, using it in places where emotional context isn't relevant. |
| 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. | Often used in contexts involving emotional intelligence or awareness. Suitable in both professional and personal conversations. Avoid in overly casual situations where it may seem too formal. |
See it in real clips
Frequently asked questions: Allergy vs Reaction vs Sensitivity
What's the difference between Allergy, Reaction, and Sensitivity?
Allergy: A reaction to something that makes you sick. Reaction: How someone responds to something. Sensitivity: The ability to understand and care about others' feelings.
Which is more common: Allergy, Reaction, and Sensitivity?
Reaction is the most common in everyday English.
Which is more advanced: Allergy, Reaction, and Sensitivity?
Sensitivity is the highest level, at C1, on the CEFR scale.
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. Sensitivity: Her sensitivity to criticism made her an empathetic friend.
Can I use Allergy, Reaction, and Sensitivity interchangeably?
Not always. Allergy, Reaction, and Sensitivity 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.