Which to use
“cis” is an adjective and “cums” is a verb - they look or sound alike but fill different roles in a sentence.
- #13,115
- “cis” frequency rank
- #45,869
- “cums” frequency rank
- 58984
- confusion score
Side-by-Side Comparison
| Feature | cis | cums |
|---|---|---|
| Definition | Having two mutations on two genes on the same chromosome of a homologous pair. | third-person singular simple present indicative of cum |
Where the eye mixes cis and cums
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between cis and cums
These two trip readers on the page rather than in the ear: cis is /sɪs/ while cums is /kʌmz/. 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 (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 58984, derived from the frequency rank of both members and their visual similarity.
cis is recorded at frequency rank #13,115, classified as anadj, pronounced /sɪs/. cums is at rank #45,869, tagged as averb, pronounced /kʌmz/.
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 58984, this pair ranks #109,015 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of cis vs cums
Shared letters: cs. Private to "cis": i. Private to "cums": mu.
"cis" · 3 letters · shape CVC · "cums" · 4 letters · shape CVCC
Known mistypes of this pair
- cums ← ccums · cmus · cumms · cumss · cusm · ucms
Frequently Asked Questions
Can "cis" and "cums" be used interchangeably?
Which is more common, "cis" or "cums"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "cis" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cums" - compare definitions side by side with the headword page. Word entry
- This pair ranks #109,015 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "cis" and "cums" also get mixed up with nearby pairs, the highest-scored neighbour is "cums vs cuny". 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 #109,015 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.