chão vs CSA, What's the Difference?

Which to use

“chão” is a noun and “CSA” is an abbrev - they look or sound alike but fill different roles in a sentence.

#1,140
“chão” frequency rank: #21,705
“CSA” frequency rank: 22845
confusion score

Side-by-Side Comparison

Feature	chão	CSA
Definition	corda	sigla de Canadian Space Agency, a Agência Espacial Canadense

Letter map: chão vs CSA

Shared letters muted; letters that set chão and CSA apart highlighted. Shared run: 1.

4 ch

chão

3 ch

CSA

Role in the sentence - chão and CSA

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: chão is anoun and CSAanabbrev. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 22845, derived from the frequency rank of both members and their visual similarity.

chão is recorded at frequency rank #1,140, classified as anoun. CSA is at rank #21,705, tagged as anabbrev.

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 22845, this pair ranks #47,095 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of chão vs CSA

Shared letters: c. Private to "chão": hoã. Private to "CSA": as.

"chão" · 4 letters · shape CCVV · "CSA" · 3 letters · shape CCV

Frequently Asked Questions

Is swapping "chão" for "CSA" ever safe?

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

In ordinary Portuguese text, does "chão" or "CSA" show up more?

"chão" is the more common of the two: it sits at frequency rank #1,140 in our Portuguese list, against #21,705 for "CSA". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Pair "chão" vs "CSA" is on the table, pick a follow-up below.

Full dictionary entry for "chão" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "CSA" - compare definitions side by side with the headword page. Word entry
This pair ranks #47,095 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"chão" and "CSA" also get mixed up with nearby pairs, the highest-scored neighbour is "chau vs CSA". Nearby pair

Confusion rank #47,095 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.