Clos vs CMOS, What's the Difference?

Which to use

“Clos” is a name and “CMOS” is a noun - they look or sound alike but fill different roles in a sentence.

#44,123
“Clos” frequency rank: #31,112
“CMOS” frequency rank: 75235
confusion score

Side-by-Side Comparison

Feature	Clos	CMOS
Definition	A surname.	Initialism of complementary metal–oxide–semiconductor.

Letter map: Clos vs CMOS

Shared letters muted; letters that set Clos and CMOS apart highlighted. Shared run: 3. Clos and CMOS follow the identical consonant-vowel pattern (CCVC). Same shape at a glance is often the real trap, independent of shared letters.

4 ch

Clos

4 ch

CMOS

Role in the sentence - Clos and CMOS

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Clos is aname and CMOSanoun. On the page they differ by a single letter - l in “Clos” becomes m in “CMOS”. Our composite confusion score for this pair is 75235, derived from the frequency rank of both members and their visual similarity.

Clos is recorded at frequency rank #44,123, classified as aname. CMOS is at rank #31,112, tagged as anoun, pronounced /ˈsiːmɒs/.

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 75235, this pair ranks #33,781 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of Clos vs CMOS

Shared letters: cos. Private to "Clos": l. Private to "CMOS": m.

"Clos" · 4 letters · shape CCVC · "CMOS" · 4 letters · shape CCVC

Known mistypes of this pair

Clos ← cclos · cllos · closs · clso · lcos
CMOS ← ccmos · cmmos · cmoss · cmso · mcos

Frequently Asked Questions

Can "Clos" and "CMOS" be used interchangeably?

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

Frequency check: "Clos" vs "CMOS" - which ranks higher?

"CMOS" is the more common of the two: it sits at frequency rank #31,112 in our English list, against #44,123 for "Clos". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pair "Clos" vs "CMOS" is on the table, pick a follow-up below.

Full dictionary entry for "Clos" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "CMOS" - compare definitions side by side with the headword page. Word entry
This pair ranks #33,781 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"Clos" and "CMOS" also get mixed up with nearby pairs, the highest-scored neighbour is "Clos vs coms". 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 #33,781 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.