sickvssingWhat's the difference?

Quick tell: sick is a adjective, sing is a verb, so they fill different roles in a sentence.

Which to use

“sick” is an adjective and “sing” is a verb - they look or sound alike but fill different roles in a sentence.

#31,561
“sick” frequency rank
#20,435
“sing” frequency rank
51996
confusion score

Side-by-Side Comparison

Feature sick sing
Definition doente cantar

Letter map: sick vs sing

Shared letters muted; letters that set sick and sing apart highlighted. Shared run: 2.

4 ch
sick
4 ch
sing

Grammar separator: sick vs sing

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sick is anadjective and singaverb. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 51996, derived from the frequency rank of both members and their visual similarity.

sick is recorded at frequency rank #31,561, classified as anadj, pronounced /sɪk/. sing is at rank #20,435, tagged as averb.

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 51996, this pair ranks #13,123 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of sick vs sing

Shared letters: is. Private to "sick": ck. Private to "sing": gn.

"sick" · 4 letters · shape CVCC  ·  "sing" · 4 letters · shape CVCC

Known mistypes of this pair

  • sickisck · scik · sicck · sickk · sikc · ssick
  • singisng · sign · singg · sinng · snig · ssing

Frequently Asked Questions

Is swapping "sick" for "sing" ever safe?
No - they are not even the same part of speech. "sick" is an adjective and "sing" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "sick" or "sing" show up more?
"sing" is the more common of the two: it sits at frequency rank #20,435 in our Portuguese list, against #31,561 for "sick". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "sick" and "sing".

  • Full dictionary entry for "sick" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sing" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #13,123 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "sick" and "sing" also get mixed up with nearby pairs, the highest-scored neighbour is "sick vs sire". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #13,123 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list