Which to use
“cost” is a verb and “costal” is an adjective - they look or sound alike but fill different roles in a sentence.
- #568
- “cost” frequency rank
- #46,995
- “costal” frequency rank
- 47563
- confusion score
Side-by-Side Comparison
| Feature | cost | costal |
|---|---|---|
| Definition | To incur a charge of; to require payment of a (specified) price. | Pertaining to a rib. |
Where the eye mixes cost and costal
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between cost and costal
These two trip readers on the page rather than in the ear: cost is /ˈkɒst/ while costal is /ˈkɑstl̩/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “cost” sits inside “costal”, and the parts of speech differ too (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 47563, derived from the frequency rank of both members and their visual similarity.
cost is recorded at frequency rank #568, classified as averb, pronounced /ˈkɒst/. costal is at rank #46,995, tagged as anadj, pronounced /ˈkɑstl̩/.
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 47563, this pair ranks #201,303 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of cost vs costal
Shared letters: cost. Private to "cost": -. Private to "costal": al.
"cost" · 4 letters · shape CVCC · "costal" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "cost" for "costal" ever safe?
Which is more common, "cost" or "costal"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "cost" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "costal" - compare definitions side by side with the headword page. Word entry
- This pair ranks #201,303 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "cost" and "costal" also get mixed up with nearby pairs, the highest-scored neighbour is "costal vs cotta". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #201,303 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.