rei vs rum, What's the Difference?

Which to use

“rei” and “rum” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#794
“rei” frequency rank: #15,451
“rum” frequency rank: 16245
confusion score

Side-by-Side Comparison

Feature	rei	rum
Definition	soberano; monarca; czar	aguardente obtida da destilação do melaço fermentado

Where the eye mixes rei and rum

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

rei

3 ch

rum

Why the eye confuses rei with rum

A purely visual mix-up. rei (/ˈRɐj/) and rum (/ˈRũ/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 16245, derived from the frequency rank of both members and their visual similarity.

rei is recorded at frequency rank #794, classified as anoun, pronounced /ˈRɐj/. rum is at rank #15,451, tagged as anoun, pronounced /ˈRũ/.

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 16245, this pair ranks #55,343 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of rei vs rum

Shared letters: r. Private to "rei": ei. Private to "rum": mu.

"rei" · 3 letters · shape CVV · "rum" · 3 letters · shape CVC

Frequently Asked Questions

Can "rei" and "rum" be used interchangeably?

No. They are said differently (/ˈRɐj/ versus /ˈRũ/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Which is more common, "rei" or "rum"?

"rei" is the more common of the two: it sits at frequency rank #794 in our Portuguese list, against #15,451 for "rum". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "rei" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "rum" - compare definitions side by side with the headword page. Word entry
This pair ranks #55,343 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"rei" and "rum" also get mixed up with nearby pairs, the highest-scored neighbour is "rum vs rust". Nearby pair

Confusion rank #55,343 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.