régia vs rei, What's the Difference?

Which to use

“régia” is an adjective and “rei” is a noun - they look or sound alike but fill different roles in a sentence.

#25,815
“régia” frequency rank: #794
“rei” frequency rank: 26609
confusion score

Side-by-Side Comparison

Feature	régia	rei
Definition	feminino de régio	soberano; monarca; czar

Letter map: régia vs rei

Shared letters muted; letters that set régia and rei apart highlighted. Shared run: 2. régia runs 5 letters (CVCVV) against rei's 3 (CVV) - the length gap alone is often enough to separate them once you know to check it.

5 ch

régia

3 ch

rei

Part-of-speech tell for régia / rei

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: régia is anadjective and reianoun. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 26609, derived from the frequency rank of both members and their visual similarity.

régia is recorded at frequency rank #25,815, classified as anadj. rei is at rank #794, tagged as anoun, pronounced /ˈRɐj/.

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 26609, this pair ranks #42,517 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of régia vs rei

Shared letters: ir. Private to "régia": agé. Private to "rei": e.

"régia" · 5 letters · shape CVCVV · "rei" · 3 letters · shape CVV

Frequently Asked Questions

Is swapping "régia" for "rei" ever safe?

No - they are not even the same part of speech. "régia" is an adjective and "rei" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "régia" or "rei" show up more?

"rei" is the more common of the two: it sits at frequency rank #794 in our Portuguese list, against #25,815 for "régia". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "régia" and "rei".

Full dictionary entry for "régia" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "rei" - compare definitions side by side with the headword page. Word entry
This pair ranks #42,517 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"régia" and "rei" also get mixed up with nearby pairs, the highest-scored neighbour is "régia vs revi". Nearby pair

Confusion rank #42,517 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.