sikvssookWhat's the difference?

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

Which to use

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

#40,893
“sik” frequency rank
#46,187
“sook” frequency rank
87080
confusion score

Side-by-Side Comparison

Feature sik sook
Definition Alternative form of sick (“cool, excellent”). Alternative spelling of suck.

Letter map: sik vs sook

Shared letters muted; letters that set sik and sook apart highlighted. Shared run: 2. sik runs 3 letters (CVC) against sook's 4 (CVVC) - the length gap alone is often enough to separate them once you know to check it.

3 ch
sik
4 ch
sook

Role in the sentence - sik and sook

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sik is anadjective and sookaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 87080, derived from the frequency rank of both members and their visual similarity.

sik is recorded at frequency rank #40,893, classified as anadj. sook is at rank #46,187, 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 87080, this pair ranks #8,096 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of sik vs sook

Shared letters: ks. Private to "sik": i. Private to "sook": o.

"sik" · 3 letters · shape CVC  ·  "sook" · 4 letters · shape CVVC

Known mistypes of this pair

  • sook ← osok · sok · soko · sookk · ssook

Frequently Asked Questions

Can "sik" and "sook" be used interchangeably?
No - they are not even the same part of speech. "sik" is an adjective and "sook" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "sik" or "sook"?
"sik" is the more common of the two: it sits at frequency rank #40,893 in our English list, against #46,187 for "sook". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "sik" vs "sook" is on the table, pick a follow-up below.

  • Full dictionary entry for "sik" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sook" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #8,096 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "sik" and "sook" also get mixed up with nearby pairs, the highest-scored neighbour is "soca vs sook". 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 #8,096 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list