Which to use
“fab” is a noun and “fai” is a verb - they look or sound alike but fill different roles in a sentence.
- #40,306
- “fab” frequency rank
- #40,830
- “fai” frequency rank
- 81136
- confusion score
Side-by-Side Comparison
| Feature | fab | fai |
|---|---|---|
| Definition | Mutación aspirada del sustantivo masculino pab ('papa'). | Tercera persona del singular (el, ela, vostede) del presente de indicativo de facer. |
Where the eye mixes fab and fai
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. fab (CVC) and fai (CVV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between fab and fai
These two trip readers on the page rather than in the ear: fab is [ˈf̬ɑːp] while fai is [ˈfa̠j]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - b in “fab” becomes i in “fai”, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 81136, derived from the frequency rank of both members and their visual similarity.
fab is recorded at frequency rank #40,306, classified as anoun, pronounced [ˈf̬ɑːp]. fai is at rank #40,830, tagged as averb, pronounced [ˈfa̠j].
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 81136, this pair ranks #10,775 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of fab vs fai
Shared letters: af. Private to "fab": b. Private to "fai": i.
"fab" · 3 letters · shape CVC · "fai" · 3 letters · shape CVV
Frequently Asked Questions
Is swapping "fab" for "fai" ever safe?
In ordinary Spanish text, does "fab" or "fai" show up more?
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 "fab" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fai" - compare definitions side by side with the headword page. Word entry
- This pair ranks #10,775 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "fab" and "fai" also get mixed up with nearby pairs, the highest-scored neighbour is "fai vs falo". Nearby pair
Confusion rank #10,775 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.