Which to use
“cos” is a pronoun and “cost” is a noun - they look or sound alike but fill different roles in a sentence.
- #27,810
- “cos” frequency rank
- #22,928
- “cost” frequency rank
- 50738
- confusion score
Side-by-Side Comparison
| Feature | cos | cost |
|---|---|---|
| Definition | qualquer coisa | custo |
Where the spellings diverge
Shared letters are muted; the letters that actually set cos and cost apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: cos is apronoun and costanoun. On the page they differ by 1 extra letter(s) - “cos” sits inside “cost”. Our composite confusion score for this pair is 50738, derived from the frequency rank of both members and their visual similarity.
cos is recorded at frequency rank #27,810, classified as apron. cost is at rank #22,928, tagged as anoun, pronounced /ˈkɔst/.
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 50738, this pair ranks #14,228 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of cos vs cost
Shared letters: cos. Private to "cos": -. Private to "cost": t.
"cos" · 3 letters · shape CVC · "cost" · 4 letters · shape CVCC
Known mistypes of this pair
- cost ← ccost · cosst · costt · cots · csot · ocst
Frequency comparison
Frequently Asked Questions
Can "cos" and "cost" be used interchangeably?
Which is more common, "cos" or "cost"?
Remembering cos vs cost
The fastest way to pick the right one every time.
- Check the role first: if you need a pronoun, it's “cos”; for a noun, it's “cost”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “cos” entry
- Browse more pairs most likely to be confused. Most confusable