Which to use
“cog” is a noun and “cough” is a verb - they look or sound alike but fill different roles in a sentence.
- #28,496
- “cog” frequency rank
- #7,668
- “cough” frequency rank
- 36164
- confusion score
Side-by-Side Comparison
| Feature | cog | cough |
|---|---|---|
| Definition | A tooth on a gear. | Sometimes followed by up: to force (something) out of the lungs or throat by pushing air from the lungs through the glottis (causing a short, explosive sound), and out through the mouth. |
Where the spellings diverge
Shared letters are muted; the letters that actually set cog and cough apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
cog and cough 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 2 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 36164, derived from the frequency rank of both members and their visual similarity.
cog is recorded at frequency rank #28,496, classified as anoun, pronounced /kɒɡ/. cough is at rank #7,668, tagged as averb, pronounced /kɒf/.
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 36164, this pair ranks #305,612 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Frequency comparison
Frequently Asked Questions
Can "cog" and "cough" be used interchangeably?
Remembering cog vs cough
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “cog”; for a verb, it's “cough”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “cog” entry
- Browse more pairs most likely to be confused. Most confusable