UNIXvsunoTell them apart

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

Which to use

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

#41,113
“UNIX” frequency rank
#77
“uno” frequency rank
41190
confusion score

Side-by-Side Comparison

Feature UNIX uno
Definition 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. La cantidad de una cosa solitaria (a saber, sin otros).

Where the eye mixes UNIX and uno

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. UNIX runs 4 letters (VCVC) against uno's 3 (VCV) - the length gap alone is often enough to separate them once you know to check it.

4 ch
UNIX
3 ch
uno

Look-alike desk: UNIX vs uno

These two trip readers on the page rather than in the ear: UNIX is [uˈniks] while uno is [ˈuno]. 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 (name vs num), which is usually the fastest check. Our composite confusion score for this pair is 41190, derived from the frequency rank of both members and their visual similarity.

UNIX is recorded at frequency rank #41,113, classified as aname, pronounced [uˈniks]. uno is at rank #77, tagged as anum, pronounced [ˈuno].

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 41190, this pair ranks #154,997 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of UNIX vs uno

Shared letters: nu. Private to "UNIX": ix. Private to "uno": o.

"UNIX" · 4 letters · shape VCVC  ·  "uno" · 3 letters · shape VCV

Known mistypes of this pair

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

Frequently Asked Questions

Can "UNIX" and "uno" be used interchangeably?
No - they are not even the same part of speech. "UNIX" is a name and "uno" a num, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "UNIX" or "uno" show up more?
"uno" is the more common of the two: it sits at frequency rank #77 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.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "UNIX" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "uno" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #154,997 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "UNIX" and "uno" 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 #154,997 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