Which to use
“knob” and “nob” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #15,203
- “knob” frequency rank
- #44,373
- “nob” frequency rank
- 59576
- confusion score
Side-by-Side Comparison
| Feature | knob | nob |
|---|---|---|
| Definition | A rounded protuberance, especially one arising from a flat surface; a fleshy lump or caruncle. | The head. |
Same sound, different letters: knob vs nob
Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 3 letters. knob runs 4 letters (CCVC) against nob's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.
Ear matches; page differs - knob and nob
This is the hard kind. knob and nob are pronounced identically (/nɒb/) and both work as anoun. Neither the ear nor the grammar will rescue you; only the meaning does, so the glosses below are the whole decision. They differ by 1 extra letter(s) - “nob” sits inside “knob”. Our composite confusion score for this pair is 59576, derived from the frequency rank of both members and their visual similarity.
knob is recorded at frequency rank #15,203, classified as anoun, pronounced /nɒb/. nob is at rank #44,373, tagged as anoun, pronounced /nɒb/.
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 59576, this pair ranks #105,331 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of knob vs nob
Shared letters: bno. Private to "knob": k. Private to "nob": -.
"knob" · 4 letters · shape CCVC · "nob" · 3 letters · shape CVC
Known mistypes of this pair
- knob ← kknob · knbo · knnob · knobb · konb · nkob
Frequently Asked Questions
Can "knob" and "nob" be used interchangeably?
In ordinary English text, does "knob" or "nob" show up more?
What to do next
"knob" and "nob" share a sound, keep the gloss open, then jump to the headword or a nearby trap.
- Full dictionary entry for "knob" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "nob" - compare definitions side by side with the headword page. Word entry
- This pair ranks #105,331 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "knob" and "nob" also get mixed up with nearby pairs, the highest-scored neighbour is "nob vs NPL". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #105,331 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.