Which to use
“coser” is a verb and “costra” is a noun - they look or sound alike but fill different roles in a sentence.
- #17,653
- “coser” frequency rank
- #44,080
- “costra” frequency rank
- 61733
- confusion score
Side-by-Side Comparison
| Feature | coser | costra |
|---|---|---|
| Definition | Usar hilo para juntar pedazos de tela, cuero u otro material flexible. | Tejido temporal formado por las plaquetas que cubre una herida para proteger la dermis durante el proceso de regeneración. |
Where the eye mixes coser and costra
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. coser runs 5 letters (CVCVC) against costra's 6 (CVCCCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses coser with costra
These two trip readers on the page rather than in the ear: coser is [koˈseɾ] while costra is [ˈkost̪ɾa]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 61733, derived from the frequency rank of both members and their visual similarity.
coser is recorded at frequency rank #17,653, classified as averb, pronounced [koˈseɾ]. costra is at rank #44,080, tagged as anoun, pronounced [ˈkost̪ɾa].
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 61733, this pair ranks #54,417 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of coser vs costra
Shared letters: cors. Private to "coser": e. Private to "costra": at.
"coser" · 5 letters · shape CVCVC · "costra" · 6 letters · shape CVCCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "coser" for "costra" ever safe?
Frequency check: "coser" vs "costra" - which ranks higher?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "coser" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "costra" - compare definitions side by side with the headword page. Word entry
- This pair ranks #54,417 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "coser" and "costra" also get mixed up with nearby pairs, the highest-scored neighbour is "casará vs costra". 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 #54,417 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.