Which to use
“contra” is a preposition and “costra” is a noun - they look or sound alike but fill different roles in a sentence.
- #129
- “contra” frequency rank
- #44,080
- “costra” frequency rank
- 44209
- confusion score
Side-by-Side Comparison
| Feature | contra | costra |
|---|---|---|
| Definition | Indica oposición. | Tejido temporal formado por las plaquetas que cubre una herida para proteger la dermis durante el proceso de regeneración. |
Where the eye mixes contra and costra
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. contra and costra follow the identical consonant-vowel pattern (CVCCCV). Same shape at a glance is often the real trap, independent of shared letters.
Look-alike desk: contra vs costra
These two trip readers on the page rather than in the ear: contra is [ˈkõn̪t̪ɾa] while costra is [ˈkost̪ɾa]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - n in “contra” becomes s in “costra”, and the parts of speech differ too (preposition vs noun), which is usually the fastest check. Our composite confusion score for this pair is 44209, derived from the frequency rank of both members and their visual similarity.
contra is recorded at frequency rank #129, classified as aprep, pronounced [ˈkõn̪t̪ɾa]. 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 44209, this pair ranks #138,345 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of contra vs costra
Shared letters: acort. Private to "contra": n. Private to "costra": s.
"contra" · 6 letters · shape CVCCCV · "costra" · 6 letters · shape CVCCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "contra" for "costra" ever safe?
Which is more common, "contra" or "costra"?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "contra" 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 #138,345 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "contra" 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 #138,345 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.