CNO
"cno" is a 3-letter English headword indexed on PlainSpell.
The verdict
“CNO” is uncommon English (frequency #86,153 among 5,599 “C” headwords), classed as a noun. The kind of spelling people second-guess.
- #86,153
- frequency rank, English
- 5,599
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of Chief of Naval Operations.
Corpus desk
Index EN-cno · CNO · English
CNO · rank #86,153 · 0 variants · 0 confusables
- FREQ-RARE #86,153
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 5,599
- PHOTO-FINISH clonidine
Nearest frequency peer: clonidine (-1 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “CNO”
Sparse band: bars invert rank so rarer forms read shorter
- Cleon
Cleon
13,853 corpus weight
- clonidine
clonidine
13,849 corpus weight
- CNO
CNO
13,848 corpus weight
- Colgan
Colgan
13,846 corpus weight
- comix
comix
13,844 corpus weight
- commandeeri…
commandeering
13,843 corpus weight
What this shows Long-tail view: where “CNO” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | CNO |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #86,153 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “CNO” in English
Rare enough to double-check
CNO is uncommon English at frequency #86,153 among 5,599 “C” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Initialism of Chief of Naval Operations.".
Our edit-distance generator produced no likely misspellings for CNO, since its letter sequence doesn't invite the usual edit-distance slips. We don't track a confusable pairing for this entry, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
No explicit etymology string is stored for this entry, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is CNO, spelled C-N-O.
Definition
- 1Initialism of Chief of Naval Operations.
Recorded use
Wiktionary exampleThese source excerpts show how CNO appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
“You know, I really didn't have much to do with Vietnam. In the summer of 1964, I went to work for the assistant CNO for submarine warfare, Op 02. But that summer, Op 03—that's surface warfare—was developing new ASW strategies.”
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "CNO", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).