seu vs sob, What's the Difference?

Which to use

“seu” is a noun and “sob” is a preposition - they look or sound alike but fill different roles in a sentence.

#31
“seu” frequency rank: #320
“sob” frequency rank: 351
confusion score

Side-by-Side Comparison

Feature	seu	sob
Definition	senhor	abaixo, em baixo

Letter map: seu vs sob

Shared letters muted; letters that set seu and sob apart highlighted. Shared run: 1.

3 ch

seu

3 ch

sob

Spelling & Dictionary Insight

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: seu is anoun and sobapreposition. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 351, derived from the frequency rank of both members and their visual similarity.

seu is recorded at frequency rank #31, classified as anoun. sob is at rank #320, tagged as aprep, pronounced /ˈsob/.

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 351, this pair ranks #75,284 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of seu vs sob

Shared letters: s. Private to "seu": eu. Private to "sob": bo.

"seu" · 3 letters · shape CVV · "sob" · 3 letters · shape CVC

Frequently Asked Questions

Can "seu" and "sob" be used interchangeably?

No - they are not even the same part of speech. "seu" is a noun and "sob" a preposition, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "seu" or "sob"?

"seu" is the more common of the two: it sits at frequency rank #31 in our Portuguese list, against #320 for "sob". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.