uniónvsUNIXTell them apart

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

Which to use

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

#904
“unión” frequency rank
#41,113
“UNIX” frequency rank
42017
confusion score

Side-by-Side Comparison

Feature unión UNIX
Definition Acción y efecto de unir o unirse. Sistema operativo multitárea y multiusuario desarrollado en 1969 por los ingenieros del laboratorio Bell de AT&T, UNIX implementó la estructura POSIX, usada actualmente por otros sistemas operativos como Linux, Solaris o BSD.

Where the eye mixes unión and UNIX

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. unión runs 5 letters (VCVVC) against UNIX's 4 (VCVC) - the length gap alone is often enough to separate them once you know to check it.

5 ch
unión
4 ch
UNIX

Look-alike desk: unión vs UNIX

These two trip readers on the page rather than in the ear: unión is [uˈnjõn] while UNIX is [uˈniks]. 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 (noun vs name), which is usually the fastest check. Our composite confusion score for this pair is 42017, derived from the frequency rank of both members and their visual similarity.

unión is recorded at frequency rank #904, classified as anoun, pronounced [uˈnjõn]. UNIX is at rank #41,113, tagged as aname, pronounced [uˈniks].

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 42017, this pair ranks #150,536 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of unión vs UNIX

Shared letters: inu. Private to "unión": ó. Private to "UNIX": x.

"unión" · 5 letters · shape VCVVC  ·  "UNIX" · 4 letters · shape VCVC

Known mistypes of this pair

  • UNIX ← nuix · uinx · unixx · unnix · unxi

Frequently Asked Questions

Can "unión" and "UNIX" be used interchangeably?
No - they are not even the same part of speech. "unión" is a noun and "UNIX" a name, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "unión" vs "UNIX" - which ranks higher?
"unión" is the more common of the two: it sits at frequency rank #904 in our Spanish list, against #41,113 for "UNIX". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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 "UNIX" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #150,536 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "unión" and "UNIX" also get mixed up with nearby pairs, the highest-scored neighbour is "ubi vs UNIX". 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 #150,536 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