Which to use
“fam” is a noun and “FSB” is a name - they look or sound alike but fill different roles in a sentence.
- #33,257
- “fam” frequency rank
- #45,626
- “FSB” frequency rank
- 78883
- confusion score
Side-by-Side Comparison
| Feature | fam | FSB |
|---|---|---|
| Definition | Faim. | Service de renseignement de la Russie chargé des affaires de sécurité intérieure, successeur du service de la sécurité intérieure du KGB. |
Where the eye mixes fam and FSB
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. fam (CVC) and FSB (CCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Why the eye confuses fam with FSB
These two trip readers on the page rather than in the ear: fam is [ˈfæm] while FSB is \ɛf.ɛs.be\. 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 name), which is usually the fastest check. Our composite confusion score for this pair is 78883, derived from the frequency rank of both members and their visual similarity.
fam is recorded at frequency rank #33,257, classified as anoun, pronounced [ˈfæm]. FSB is at rank #45,626, tagged as aname, pronounced \ɛf.ɛs.be\.
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 78883, this pair ranks #24,620 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of fam vs FSB
Shared letters: f. Private to "fam": am. Private to "FSB": bs.
"fam" · 3 letters · shape CVC · "FSB" · 3 letters · shape CCC
Frequently Asked Questions
Is swapping "fam" for "FSB" ever safe?
Which is more common, "fam" or "FSB"?
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 "fam" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "FSB" - compare definitions side by side with the headword page. Word entry
- This pair ranks #24,620 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "fam" and "FSB" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs FSB". Nearby pair
Confusion rank #24,620 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.