alienvsalióTell them apart

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

Which to use

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

#16,005
“alien” frequency rank
#48,792
“alió” frequency rank
64797
confusion score

Side-by-Side Comparison

Feature alien alió
Definition Que viene de fuera del planeta Tierra. Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del pretérito perfecto simple de indicativo de aliar o de aliarse.

Where the eye mixes alien and alió

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
alien
4 ch
alió

Visual trap between alien and alió

These two trip readers on the page rather than in the ear: alien is [ˈaljẽn] while alió is [aˈljo]. 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 verb), which is usually the fastest check. Our composite confusion score for this pair is 64797, derived from the frequency rank of both members and their visual similarity.

alien is recorded at frequency rank #16,005, classified as anoun, pronounced [ˈaljẽn]. alió is at rank #48,792, tagged as averb, pronounced [aˈljo].

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 64797, this pair ranks #44,541 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of alien vs alió

Shared letters: ail. Private to "alien": en. Private to "alió": ó.

"alien" · 5 letters · shape VCVVC  ·  "alió" · 4 letters · shape VCVV

Known mistypes of this pair

  • alienailen · alein · alienn · aline · allien · laien

Frequently Asked Questions

Can "alien" and "alió" be used interchangeably?
No - they are not even the same part of speech. "alien" is a noun and "alió" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "alien" or "alió" show up more?
"alien" is the more common of the two: it sits at frequency rank #16,005 in our Spanish list, against #48,792 for "alió". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "alien" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "alió" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #44,541 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "alien" and "alió" also get mixed up with nearby pairs, the highest-scored neighbour is "alió vs apis". 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 #44,541 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