reaciovsreactorWhich spelling fits?

Quick tell: reacio is a adjective, reactor is a noun, so they fill different roles in a sentence.

Which to use

“reacio” is an adjective and “reactor” is a noun - they look or sound alike but fill different roles in a sentence.

#35,716
“reacio” frequency rank
#14,438
“reactor” frequency rank
50154
confusion score

Side-by-Side Comparison

Feature reacio reactor
Definition Que se opone o se resiste a actuar. Un tipo de motor.^([definición imprecisa])

Where the eye mixes reacio and reactor

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.

6 ch
reacio
7 ch
reactor

Visual trap between reacio and reactor

These two trip readers on the page rather than in the ear: reacio is [reˈasjo] while reactor is [reakˈt̪oɾ]. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 50154, derived from the frequency rank of both members and their visual similarity.

reacio is recorded at frequency rank #35,716, classified as anadj, pronounced [reˈasjo]. reactor is at rank #14,438, tagged as anoun, pronounced [reakˈt̪oɾ].

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 50154, this pair ranks #104,798 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of reacio vs reactor

Shared letters: aceor. Private to "reacio": i. Private to "reactor": t.

"reacio" · 6 letters · shape CVVCVV  ·  "reactor" · 7 letters · shape CVVCCVC

Known mistypes of this pair

  • reacioeracio · raecio · reaccio · reacoi · reaico · reasio · recaio · rreacio
  • reactoreractor · raector · reacctor · reacotr · reactorr · reactro · reacttor · reatcor

Frequently Asked Questions

Is swapping "reacio" for "reactor" ever safe?
No - they are not even the same part of speech. "reacio" is an adjective and "reactor" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "reacio" or "reactor"?
"reactor" is the more common of the two: it sits at frequency rank #14,438 in our Spanish list, against #35,716 for "reacio". 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 "reacio" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "reactor" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #104,798 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "reacio" and "reactor" also get mixed up with nearby pairs, the highest-scored neighbour is "reacio vs reactivo". 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 #104,798 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