Which to use
“redo” is a verb and “rex” is a noun - they look or sound alike but fill different roles in a sentence.
- #22,787
- “redo” frequency rank
- #8,478
- “rex” frequency rank
- 31265
- confusion score
Side-by-Side Comparison
| Feature | redo | rex |
|---|---|---|
| Definition | To do again. | A king, particularly in ancient Rome. |
Where the eye mixes redo and rex
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses redo with rex
These two trip readers on the page rather than in the ear: redo is /ɹiˈduː/ while rex is /ˈɹɛks/. 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 (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 31265, derived from the frequency rank of both members and their visual similarity.
redo is recorded at frequency rank #22,787, classified as averb, pronounced /ɹiˈduː/. rex is at rank #8,478, tagged as anoun, pronounced /ˈɹɛks/.
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 31265, this pair ranks #347,582 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of redo vs rex
Shared letters: er. Private to "redo": do. Private to "rex": x.
"redo" · 4 letters · shape CVCV · "rex" · 3 letters · shape CVC
Known mistypes of this pair
- redo ← erdo · rdeo · reddo · reod · rredo
Frequently Asked Questions
Can "redo" and "rex" be used interchangeably?
Frequency check: "redo" vs "rex" - which ranks higher?
After this comparison
Eye-level mix-up between "redo" and "rex" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "redo" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rex" - compare definitions side by side with the headword page. Word entry
- This pair ranks #347,582 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "redo" and "rex" also get mixed up with nearby pairs, the highest-scored neighbour is "redo vs reedy". 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 #347,582 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.