Sau vs sun, What's the Difference?

Which to use

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

#49,171
“Sau” frequency rank: #7,698
“sun” frequency rank: 56869
confusion score

Side-by-Side Comparison

Feature	Sau	sun
Definition	porco	Sol

Where the eye mixes Sau and sun

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch

sun

Look-alike desk: Sau vs sun

A purely visual mix-up. Sau (/zaʊ̯/) and sun (/sʌn/) 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 56869, derived from the frequency rank of both members and their visual similarity.

Sau is recorded at frequency rank #49,171, classified as anoun, pronounced /zaʊ̯/. sun is at rank #7,698, tagged as anoun, pronounced /sʌn/.

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 56869, this pair ranks #9,682 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of Sau vs sun

Shared letters: su. Private to "Sau": a. Private to "sun": n.

"Sau" · 3 letters · shape CVV · "sun" · 3 letters · shape CVC

Frequently Asked Questions

Can "Sau" and "sun" be used interchangeably?

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

Which is more common, "Sau" or "sun"?

"sun" is the more common of the two: it sits at frequency rank #7,698 in our Portuguese list, against #49,171 for "Sau". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

Full dictionary entry for "Sau" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "sun" - compare definitions side by side with the headword page. Word entry
This pair ranks #9,682 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"Sau" and "sun" also get mixed up with nearby pairs, the highest-scored neighbour is "Sau vs soap". Nearby pair

Confusion rank #9,682 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.