Which to use
“sink” is a verb and “sis” is a noun - they look or sound alike but fill different roles in a sentence.
- #5,081
- “sink” frequency rank
- #12,501
- “sis” frequency rank
- 17582
- confusion score
Side-by-Side Comparison
| Feature | sink | sis |
|---|---|---|
| Definition | To move or be moved into something. | Clipping of sister. |
Where the eye mixes sink and sis
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses sink with sis
These two trip readers on the page rather than in the ear: sink is /ˈsɪŋk/ while sis is /sɪs/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 17582, derived from the frequency rank of both members and their visual similarity.
sink is recorded at frequency rank #5,081, classified as averb, pronounced /ˈsɪŋk/. sis is at rank #12,501, tagged as anoun, pronounced /sɪs/.
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 17582, this pair ranks #450,450 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of sink vs sis
Shared letters: is. Private to "sink": kn. Private to "sis": -.
"sink" · 4 letters · shape CVCC · "sis" · 3 letters · shape CVC
Known mistypes of this pair
- sink ← isnk · sinkk · sinnk · snik · ssink
Frequently Asked Questions
Is swapping "sink" for "sis" ever safe?
Frequency check: "sink" vs "sis" - which ranks higher?
After this comparison
Eye-level mix-up between "sink" and "sis" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "sink" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sis" - compare definitions side by side with the headword page. Word entry
- This pair ranks #450,450 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sink" and "sis" also get mixed up with nearby pairs, the highest-scored neighbour is "sis vs suds". 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 #450,450 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.