FBIvsfutWhich spelling fits?

Quick tell: FBI is a abbrev, fut is a verb, so they fill different roles in a sentence.

Which to use

“FBI” is an abbrev and “fut” is a verb - they look or sound alike but fill different roles in a sentence.

#9,456
“FBI” frequency rank
#39,242
“fut” frequency rank
48698
confusion score

Side-by-Side Comparison

Feature FBI fut
Definition Sigla de Federal Bureau of Investigation, término del inglés que traduce como Oficina Federal de Investigación (agencia de investigación criminal de los Estados Unidos de América). Pasado simple del modo indicativo del verbo être y para il/elle/on.

Where the eye mixes FBI and fut

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
FBI
3 ch
fut

Why the eye confuses FBI with fut

These two trip readers on the page rather than in the ear: FBI is [ˈfβ̞i] while fut is /fy/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (abbrev vs verb), which is usually the fastest check. Our composite confusion score for this pair is 48698, derived from the frequency rank of both members and their visual similarity.

FBI is recorded at frequency rank #9,456, classified as anabbrev, pronounced [ˈfβ̞i]. fut is at rank #39,242, tagged as averb, pronounced /fy/.

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 48698, this pair ranks #113,002 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of FBI vs fut

Shared letters: f. Private to "FBI": bi. Private to "fut": tu.

"FBI" · 3 letters · shape CCV  ·  "fut" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "FBI" for "fut" ever safe?
No - they are not even the same part of speech. "FBI" is an abbrev and "fut" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "FBI" or "fut"?
"FBI" is the more common of the two: it sits at frequency rank #9,456 in our Spanish list, against #39,242 for "fut". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Eye-level mix-up between "FBI" and "fut" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "FBI" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fut" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #113,002 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "FBI" and "fut" also get mixed up with nearby pairs, the highest-scored neighbour is "fuste vs fut". Nearby pair

Confusion rank #113,002 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