s vs sky, What's the Difference?

Which to use

“s” is a symbol and “sky” is a noun - they look or sound alike but fill different roles in a sentence.

#511
“s” frequency rank: #7,084
“sky” frequency rank: 7595
confusion score

Side-by-Side Comparison

Feature	s	sky
Definition	símbolo de segundo	céu

Letter map: s vs sky

Shared letters muted; letters that set s and sky apart highlighted. Shared run: 1.

1 ch

3 ch

sky

Role in the sentence - s and sky

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: s is asymbol and skyanoun. On the page they differ by 2 extra letter(s) - “s” sits inside “sky”. Our composite confusion score for this pair is 7595, derived from the frequency rank of both members and their visual similarity.

s is recorded at frequency rank #511, classified as asymbol. sky is at rank #7,084, tagged as anoun, pronounced /skaɪ/.

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 7595, this pair ranks #66,519 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of s vs sky

Shared letters: s. Private to "s": -. Private to "sky": ky.

"s" · 1 letters · shape C · "sky" · 3 letters · shape CCV

Frequently Asked Questions

Is swapping "s" for "sky" ever safe?

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

In ordinary Portuguese text, does "s" or "sky" show up more?

"s" is the more common of the two: it sits at frequency rank #511 in our Portuguese list, against #7,084 for "sky". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "s" and "sky".

Full dictionary entry for "s" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "sky" - compare definitions side by side with the headword page. Word entry
This pair ranks #66,519 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"s" and "sky" also get mixed up with nearby pairs, the highest-scored neighbour is "Sau vs sky". Nearby pair

Confusion rank #66,519 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.