CMOS vs CPS, What's the Difference?

Which to use

“CMOS” and “CPS” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#31,112
“CMOS” frequency rank: #16,880
“CPS” frequency rank: 47992
confusion score

Side-by-Side Comparison

Feature	CMOS	CPS
Definition	Initialism of complementary metal–oxide–semiconductor.	Initialism of characters per second.

Letter map: CMOS vs CPS

Shared letters muted; letters that set CMOS and CPS apart highlighted. Shared run: 2.

4 ch

CMOS

3 ch

CPS

Pair insight - CMOS / CPS

CMOS and CPS are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 47992, derived from the frequency rank of both members and their visual similarity.

CMOS is recorded at frequency rank #31,112, classified as anoun, pronounced /ˈsiːmɒs/. CPS is at rank #16,880, tagged as anoun.

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 47992, this pair ranks #197,351 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of CMOS vs CPS

Shared letters: cs. Private to "CMOS": mo. Private to "CPS": p.

"CMOS" · 4 letters · shape CCVC · "CPS" · 3 letters · shape CCC

Known mistypes of this pair

CMOS ← ccmos · cmmos · cmoss · cmso · mcos

Frequently Asked Questions

Is swapping "CMOS" for "CPS" ever safe?

No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "CMOS" or "CPS"?

"CPS" is the more common of the two: it sits at frequency rank #16,880 in our English list, against #31,112 for "CMOS". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "CMOS" and "CPS". Here's where to go from here.

Full dictionary entry for "CMOS" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "CPS" - compare definitions side by side with the headword page. Word entry
This pair ranks #197,351 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"CMOS" and "CPS" also get mixed up with nearby pairs, the highest-scored neighbour is "CMOS 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 #197,351 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.