Which to use
“aerobic” is an adjective and “aerobics” is a noun - they look or sound alike but fill different roles in a sentence.
- #22,563
- “aerobic” frequency rank
- #39,180
- “aerobics” frequency rank
- 61743
- confusion score
Side-by-Side Comparison
| Feature | aerobic | aerobics |
|---|---|---|
| Definition | Living or occurring only in the presence of oxygen e.g. aerobic bacteria. | A form of exercise, designed to enhance one's cardiovascular fitness, normally performed to music. |
Where the spellings diverge
Shared letters are muted; the letters that actually set aerobic and aerobics apart are highlighted. They share 7 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
aerobic and aerobics 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 extra letter(s) - “aerobic” sits inside “aerobics” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 61743, derived from the frequency rank of both members and their visual similarity.
aerobic is recorded at frequency rank #22,563, classified as anadj, pronounced /ɛəˈɹəʊ.bɪk/. aerobics is at rank #39,180, tagged as anoun, pronounced /əˈɹəʊbɪks/.
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 61743, this pair ranks #92,473 of 530,003 scored English confusable pairs - among the most confusable pairs.
Frequency comparison
Frequently Asked Questions
Can "aerobic" and "aerobics" be used interchangeably?
Remembering aerobic vs aerobics
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “aerobic”; for a noun, it's “aerobics”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “aerobic” entry
- Browse more pairs most likely to be confused. Most confusable