Which to use
“decena” is a noun and “decenas” is an adjective - they look or sound alike but fill different roles in a sentence.
- #25,593
- “decena” frequency rank
- #5,299
- “decenas” frequency rank
- 30892
- confusion score
Side-by-Side Comparison
| Feature | decena | decenas |
|---|---|---|
| Definition | Conjunto formado por diez elementos. | Forma del femenino plural de deceno. |
Where the eye mixes decena and decenas
Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. decena runs 6 letters (CVCVCV) against decenas's 7 (CVCVCVC) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between decena and decenas
These two trip readers on the page rather than in the ear: decena is [d̪eˈsena] while decenas is [d̪eˈsenas]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 extra letter(s) - “decena” sits inside “decenas”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 30892, derived from the frequency rank of both members and their visual similarity.
decena is recorded at frequency rank #25,593, classified as anoun, pronounced [d̪eˈsena]. decenas is at rank #5,299, tagged as anadj, pronounced [d̪eˈsenas].
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 30892, this pair ranks #209,793 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of decena vs decenas
Shared letters: acden. Private to "decena": -. Private to "decenas": s.
"decena" · 6 letters · shape CVCVCV · "decenas" · 7 letters · shape CVCVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "decena" for "decenas" ever safe?
Frequency check: "decena" vs "decenas" - which ranks higher?
Useful next steps
Eye-level mix-up between "decena" and "decenas" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "decena" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "decenas" - compare definitions side by side with the headword page. Word entry
- This pair ranks #209,793 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "decena" and "decenas" also get mixed up with nearby pairs, the highest-scored neighbour is "decena vs detenía". 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 #209,793 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.