Which to use
“rex” is a noun and “ri” is a preposition - they look or sound alike but fill different roles in a sentence.
- #12,766
- “rex” frequency rank
- #7,570
- “ri” frequency rank
- 20336
- confusion score
Side-by-Side Comparison
| Feature | rex | ri |
|---|---|---|
| Definition | cachorro | para, contra |
Letter map: rex vs ri
Shared letters muted; letters that set rex and ri apart highlighted. Shared run: 1.
Grammar separator: rex vs ri
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: rex is anoun and riapreposition. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 20336, derived from the frequency rank of both members and their visual similarity.
rex is recorded at frequency rank #12,766, classified as anoun. ri is at rank #7,570, tagged as aprep.
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 20336, this pair ranks #50,200 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of rex vs ri
Shared letters: r. Private to "rex": ex. Private to "ri": i.
"rex" · 3 letters · shape CVC · "ri" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "rex" for "ri" ever safe?
Which is more common, "rex" or "ri"?
What to do next
Pair "rex" vs "ri" is on the table, pick a follow-up below.
- Full dictionary entry for "rex" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ri" - compare definitions side by side with the headword page. Word entry
- This pair ranks #50,200 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "rex" and "ri" also get mixed up with nearby pairs, the highest-scored neighbour is "rabi vs ri". Nearby pair
Confusion rank #50,200 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.