Which to use
“unión” is a noun and “unísono” is an adjective - they look or sound alike but fill different roles in a sentence.
- #904
- “unión” frequency rank
- #27,811
- “unísono” frequency rank
- 28715
- confusion score
Side-by-Side Comparison
| Feature | unión | unísono |
|---|---|---|
| Definition | Acción y efecto de unir o unirse. | Que suena similar o que tiene el mismo tono que otra cosa. |
Where the eye mixes unión and unísono
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. unión runs 5 letters (VCVVC) against unísono's 7 (VCVCVCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses unión with unísono
These two trip readers on the page rather than in the ear: unión is [uˈnjõn] while unísono is [uˈnisono]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 28715, derived from the frequency rank of both members and their visual similarity.
unión is recorded at frequency rank #904, classified as anoun, pronounced [uˈnjõn]. unísono is at rank #27,811, tagged as anadj, pronounced [uˈnisono].
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 28715, this pair ranks #220,635 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of unión vs unísono
Shared letters: nu. Private to "unión": ió. Private to "unísono": osí.
"unión" · 5 letters · shape VCVVC · "unísono" · 7 letters · shape VCVCVCV
Frequently Asked Questions
Can "unión" and "unísono" be used interchangeably?
Which is more common, "unión" or "unísono"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "unión" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "unísono" - compare definitions side by side with the headword page. Word entry
- This pair ranks #220,635 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "unión" and "unísono" also get mixed up with nearby pairs, the highest-scored neighbour is "unión vs upon". Nearby pair
Confusion rank #220,635 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.