CMV vs CSS, What's the Difference?

Which to use

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

#46,987
“CMV” frequency rank: #16,676
“CSS” frequency rank: 63663
confusion score

Side-by-Side Comparison

Feature	CMV	CSS
Definition	Initialism of cytomegalovirus.	Initialism of change segment status, a GDS code used on older types of airline keyboards.

Letter map: CMV vs CSS

Shared letters muted; letters that set CMV and CSS apart highlighted. Shared run: 1.

3 ch

CMV

3 ch

CSS

Spelling & dictionary notes on CMV vs CSS

CMV and CSS 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 share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 63663, derived from the frequency rank of both members and their visual similarity.

CMV is recorded at frequency rank #46,987, classified as anoun. CSS is at rank #16,676, tagged as anoun, pronounced /siː ɛs ˈɛs/.

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 63663, this pair ranks #81,754 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of CMV vs CSS

Shared letters: c. Private to "CMV": mv. Private to "CSS": s.

"CMV" · 3 letters · shape CCC · "CSS" · 3 letters · shape CCC

Frequently Asked Questions

Do "CMV" and "CSS" mean the same thing in a sentence?

No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

In ordinary English text, does "CMV" or "CSS" show up more?

"CSS" is the more common of the two: it sits at frequency rank #16,676 in our English list, against #46,987 for "CMV". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "CMV" vs "CSS" is on the table, pick a follow-up below.

Full dictionary entry for "CMV" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "CSS" - compare definitions side by side with the headword page. Word entry
This pair ranks #81,754 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"CMV" and "CSS" also get mixed up with nearby pairs, the highest-scored neighbour is "CGT vs CMV". Nearby pair

Confusion rank #81,754 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.