Which to use
“costosa” is an adjective and “costra” is a noun - they look or sound alike but fill different roles in a sentence.
- #18,203
- “costosa” frequency rank
- #44,080
- “costra” frequency rank
- 62283
- confusion score
Side-by-Side Comparison
| Feature | costosa | costra |
|---|---|---|
| Definition | Forma del femenino de costoso. | Tejido temporal formado por las plaquetas que cubre una herida para proteger la dermis durante el proceso de regeneración. |
Where the eye mixes costosa and costra
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. costosa runs 7 letters (CVCCVCV) 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 costosa with costra
These two trip readers on the page rather than in the ear: costosa is [kosˈt̪osa] 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 62283, derived from the frequency rank of both members and their visual similarity.
costosa is recorded at frequency rank #18,203, classified as anadj, pronounced [kosˈt̪osa]. 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 62283, this pair ranks #52,576 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of costosa vs costra
Shared letters: acost. Private to "costosa": -. Private to "costra": r.
"costosa" · 7 letters · shape CVCCVCV · "costra" · 6 letters · shape CVCCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "costosa" for "costra" ever safe?
Which is more common, "costosa" or "costra"?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "costosa" 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 #52,576 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "costosa" 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 #52,576 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.