Which to use
“red” is an adjective and “rex” is a noun - they look or sound alike but fill different roles in a sentence.
- #3,284
- “red” frequency rank
- #12,766
- “rex” frequency rank
- 16050
- confusion score
Side-by-Side Comparison
| Feature | red | rex |
|---|---|---|
| Definition | vermelho, encarnado | cachorro |
Letter map: red vs rex
Shared letters muted; letters that set red and rex apart highlighted. Shared run: 2.
Part-of-speech tell for red / rex
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: red is anadjective and rexanoun. On the page they differ by a single letter - d in “red” becomes x in “rex”. Our composite confusion score for this pair is 16050, derived from the frequency rank of both members and their visual similarity.
red is recorded at frequency rank #3,284, classified as anadj, pronounced /red/. rex is at rank #12,766, tagged as anoun.
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 16050, this pair ranks #55,593 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of red vs rex
Shared letters: er. Private to "red": d. Private to "rex": x.
"red" · 3 letters · shape CVC · "rex" · 3 letters · shape CVC
Frequently Asked Questions
Is swapping "red" for "rex" ever safe?
Which is more common, "red" or "rex"?
After this comparison
Pair "red" vs "rex" is on the table, pick a follow-up below.
- Full dictionary entry for "red" 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 #55,593 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "red" and "rex" also get mixed up with nearby pairs, the highest-scored neighbour is "revi vs rex". Nearby pair
Confusion rank #55,593 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.