falsevsfasWhich spelling fits?

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

Which to use

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

#34,119
“false” frequency rank
#27,227
“fas” frequency rank
61346
confusion score

Side-by-Side Comparison

Feature false fas
Definition Falso. Cara, faz, haz, jeta, rostro.

Where the eye mixes false and fas

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

5 ch
false
3 ch
fas

Look-alike desk: false vs fas

These two trip readers on the page rather than in the ear: false is /fɔːls/ while fas is /ˈfasː/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 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 61346, derived from the frequency rank of both members and their visual similarity.

false is recorded at frequency rank #34,119, classified as anadj, pronounced /fɔːls/. fas is at rank #27,227, tagged as anoun, pronounced /ˈfasː/.

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 61346, this pair ranks #55,769 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of false vs fas

Shared letters: afs. Private to "false": el. Private to "fas": -.

"false" · 5 letters · shape CVCCV  ·  "fas" · 3 letters · shape CVC

Known mistypes of this pair

  • false ← aflse · falce · fales · fallse · falsse · fasle · ffalse · flase

Frequently Asked Questions

Can "false" and "fas" be used interchangeably?
No - they are not even the same part of speech. "false" is an adjective and "fas" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "false" or "fas" show up more?
"fas" is the more common of the two: it sits at frequency rank #27,227 in our Spanish list, against #34,119 for "false". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "false" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fas" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #55,769 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "false" and "fas" also get mixed up with nearby pairs, the highest-scored neighbour is "false vs falsear". 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 #55,769 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