uníavsuniónTell them apart

Quick tell: unía is a verb, unión is a noun, so they fill different roles in a sentence.

Which to use

“unía” is a verb and “unión” is a noun - they look or sound alike but fill different roles in a sentence.

#24,689
“unía” frequency rank
#904
“unión” frequency rank
25593
confusion score

Side-by-Side Comparison

Feature unía unión
Definition Primera persona del singular (yo) del pretérito imperfecto de indicativo de unir o de unirse. Acción y efecto de unir o unirse.

Where the eye mixes unía and unión

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
unía
5 ch
unión

Look-alike desk: unía vs unión

These two trip readers on the page rather than in the ear: unía is [uˈnia] while unión is [uˈnjõn]. 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 25593, derived from the frequency rank of both members and their visual similarity.

unía is recorded at frequency rank #24,689, classified as averb, pronounced [uˈnia]. unión is at rank #904, tagged as anoun, pronounced [uˈnjõn].

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 25593, this pair ranks #235,718 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of unía vs unión

Shared letters: nu. Private to "unía": . Private to "unión": .

"unía" · 4 letters · shape VCVV  ·  "unión" · 5 letters · shape VCVVC

Frequently Asked Questions

Can "unía" and "unión" be used interchangeably?
No - they are not even the same part of speech. "unía" is a verb and "unión" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "unía" or "unión" show up more?
"unión" is the more common of the two: it sits at frequency rank #904 in our Spanish list, against #24,689 for "unía". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Eye-level mix-up between "unía" and "unión" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "unía" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "unión" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #235,718 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "unía" and "unión" also get mixed up with nearby pairs, the highest-scored neighbour is "unía vs urea". Nearby pair

Confusion rank #235,718 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list