sac vs sei, What's the Difference?

Which to use

“sac” is a noun and “sei” is an intj - they look or sound alike but fill different roles in a sentence.

#23,816
“sac” frequency rank: #118
“sei” frequency rank: 23934
confusion score

Side-by-Side Comparison

Feature	sac	sei
Definition	saco, bolsa	expressa que aquilo ouvido que foi dito ou afirmado por alguém não é tomado como sendo a verdade

Letter map: sac vs sei

Shared letters muted; letters that set sac and sei apart highlighted. Shared run: 1.

3 ch

sac

3 ch

sei

Grammar separator: sac vs sei

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sac is anoun and seianintj. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 23934, derived from the frequency rank of both members and their visual similarity.

sac is recorded at frequency rank #23,816, classified as anoun, pronounced \sak\. sei is at rank #118, tagged as anintj.

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 23934, this pair ranks #45,800 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sac vs sei

Shared letters: s. Private to "sac": ac. Private to "sei": ei.

"sac" · 3 letters · shape CVC · "sei" · 3 letters · shape CVV

Frequently Asked Questions

Can "sac" and "sei" be used interchangeably?

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

Frequency check: "sac" vs "sei" - which ranks higher?

"sei" is the more common of the two: it sits at frequency rank #118 in our Portuguese list, against #23,816 for "sac". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Pair "sac" vs "sei" is on the table, pick a follow-up below.

Full dictionary entry for "sac" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "sei" - compare definitions side by side with the headword page. Word entry
This pair ranks #45,800 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"sac" and "sei" also get mixed up with nearby pairs, the highest-scored neighbour is "sac vs soap". Nearby pair

Confusion rank #45,800 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.