Which to use
“rude” is an adjective and “run” is a verb - they look or sound alike but fill different roles in a sentence.
- #4,709
- “rude” frequency rank
- #309
- “run” frequency rank
- 5018
- confusion score
Side-by-Side Comparison
| Feature | rude | run |
|---|---|---|
| Definition | Lacking in refinement or civility; bad-mannered; discourteous. | To move swiftly. |
Where the eye mixes rude and run
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between rude and run
These two trip readers on the page rather than in the ear: rude is /ɹuːd/ while run is /ɹʌn/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 5018, derived from the frequency rank of both members and their visual similarity.
rude is recorded at frequency rank #4,709, classified as anadj, pronounced /ɹuːd/. run is at rank #309, tagged as averb, pronounced /ɹʌn/.
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 5018, this pair ranks #516,868 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of rude vs run
Shared letters: ru. Private to "rude": de. Private to "run": n.
"rude" · 4 letters · shape CVCV · "run" · 3 letters · shape CVC
Known mistypes of this pair
- rude ← rdue · rrude · rudde · rued · urde
Frequently Asked Questions
Is swapping "rude" for "run" ever safe?
In ordinary English text, does "rude" or "run" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "rude" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "run" - compare definitions side by side with the headword page. Word entry
- This pair ranks #516,868 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "rude" and "run" also get mixed up with nearby pairs, the highest-scored neighbour is "Rua vs rude". 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 #516,868 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.