sad vs Sau, What's the Difference?

Which to use

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

#13,385
“sad” frequency rank: #49,171
“Sau” frequency rank: 62556
confusion score

Side-by-Side Comparison

Feature	sad	Sau
Definition	triste	porco

Where the eye mixes sad and Sau

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. sad (CVC) and Sau (CVV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch

sad

3 ch

Visual trap between sad and Sau

These two trip readers on the page rather than in the ear: sad is /sæd/ while Sau is /zaʊ̯/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - d in “sad” becomes u in “Sau”, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 62556, derived from the frequency rank of both members and their visual similarity.

sad is recorded at frequency rank #13,385, classified as anadj, pronounced /sæd/. Sau is at rank #49,171, tagged as anoun, pronounced /zaʊ̯/.

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 62556, this pair ranks #6,604 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of sad vs Sau

Shared letters: as. Private to "sad": d. Private to "Sau": u.

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

Frequently Asked Questions

Is swapping "sad" for "Sau" ever safe?

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

In ordinary Portuguese text, does "sad" or "Sau" show up more?

"sad" is the more common of the two: it sits at frequency rank #13,385 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.

What to do next

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

Full dictionary entry for "sad" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "Sau" - compare definitions side by side with the headword page. Word entry
This pair ranks #6,604 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"sad" and "Sau" also get mixed up with nearby pairs, the highest-scored neighbour is "Sau vs soap". Nearby pair

Confusion rank #6,604 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.