Which to use
“allergic” is an adjective and “allergy” is a noun - they look or sound alike but fill different roles in a sentence.
- #9,845
- “allergic” frequency rank
- #12,905
- “allergy” frequency rank
- 22750
- confusion score
Side-by-Side Comparison
| Feature | allergic | allergy |
|---|---|---|
| Definition | Of or pertaining to allergy. | A disorder of the immune system causing adverse reactions to substances (allergens) not harmful to most and marked by the body's production of histamines and associated with atopy, anaphylaxis, and asthma; any condition of hypersensitivity to a substance. |
Where the spellings diverge
Shared letters are muted; the letters that actually set allergic and allergy apart are highlighted. They share 6 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
allergic and allergy form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 1 letter(s) in length - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 22750, derived from the frequency rank of both members and their visual similarity.
allergic is recorded at frequency rank #9,845, classified as anadj, pronounced /əˈlɜː.dʒɪk/. allergy is at rank #12,905, tagged as anoun, pronounced /ˈæl.əɹ.d͡ʒi/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 22750, this pair ranks #414,290 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "allergic" and "allergy" be used interchangeably?
Remembering allergic vs allergy
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “allergic”; for a noun, it's “allergy”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “allergic” entry
- Browse more pairs most likely to be confused. Most confusable