famvsfuiTell them apart

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

Which to use

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

#24,871
“fam” frequency rank
#852
“fui” frequency rank
25723
confusion score

Side-by-Side Comparison

Feature fam fui
Definition Hambre. Primera persona del singular (yo) del pretérito perfecto simple de indicativo de ser.

Where the eye mixes fam and fui

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

3 ch
fam
3 ch
fui

Why the eye confuses fam with fui

These two trip readers on the page rather than in the ear: fam is [ˈfam] while fui is [ˈfwi]. 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 (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 25723, derived from the frequency rank of both members and their visual similarity.

fam is recorded at frequency rank #24,871, classified as anoun, pronounced [ˈfam]. fui is at rank #852, tagged as averb, pronounced [ˈfwi].

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 25723, this pair ranks #235,116 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of fam vs fui

Shared letters: f. Private to "fam": am. Private to "fui": iu.

"fam" · 3 letters · shape CVC  ·  "fui" · 3 letters · shape CVV

Frequently Asked Questions

Can "fam" and "fui" be used interchangeably?
No - they are not even the same part of speech. "fam" is a noun and "fui" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "fam" or "fui" show up more?
"fui" is the more common of the two: it sits at frequency rank #852 in our Spanish list, against #24,871 for "fam". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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

  • Full dictionary entry for "fam" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fui" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #235,116 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "fam" and "fui" also get mixed up with nearby pairs, the highest-scored neighbour is "fam vs flama". Nearby pair

Confusion rank #235,116 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