Which to use
“fit” is an adjective and “FSB” is a noun - they look or sound alike but fill different roles in a sentence.
- #3,655
- “fit” frequency rank
- #41,175
- “FSB” frequency rank
- 44830
- confusion score
Side-by-Side Comparison
| Feature | fit | FSB |
|---|---|---|
| Definition | in guter gesundheitlicher, sportlicher, physischer, psychischer Verfassung; gut vorbereitet | russischer Inlandsgeheimdienst und Geheimpolizei |
Where the eye mixes fit and FSB
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: fit vs FSB
These two trip readers on the page rather than in the ear: fit is [fɪt] while FSB is [ɛfʔɛsˈbeː]. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 44830, derived from the frequency rank of both members and their visual similarity.
fit is recorded at frequency rank #3,655, classified as anadj, pronounced [fɪt]. FSB is at rank #41,175, tagged as anoun, pronounced [ɛfʔɛsˈbeː].
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 44830, this pair ranks #1,373,378 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fit vs FSB
Shared letters: f. Private to "fit": it. Private to "FSB": bs.
"fit" · 3 letters · shape CVC · "FSB" · 3 letters · shape CCC
Frequently Asked Questions
Can "fit" and "FSB" be used interchangeably?
Which is more common, "fit" or "FSB"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "fit" 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 #1,373,378 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "fit" and "FSB" also get mixed up with nearby pairs, the highest-scored neighbour is "fist vs FSB". Nearby pair
Confusion rank #1,373,378 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.