CEO
"ceo" is a 3-letter English headword indexed on PlainSpell.
The verdict
“CEO” is a regularly-used English word, ranked #3,216 in English word frequency and used as a noun.
- #3,216
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of chief executive officer.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | CEO |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #3,216 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “CEO” sits in English frequency
Spelling & Dictionary Insight
The English entry for CEO is 3 letters long, classified as a noun. Corpus data places it at rank #3,216 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 5 distinct senses for this headword, so context determines which meaning a reader should apply.
We couldn't generate a plausible misspelling set for CEO, which points to an orthography that plays by predictable English rules. It also participates in 20 confusable-pair relationships, "co", "CM", "CT", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Our source data has no etymology on file for this entry, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is CEO, spelled C-E-O.
Definition
- 1Initialism of chief executive officer.
- 2Initialism of chief executive officer.
- 3Initialism of civil enforcement officer.
- 4Acronym of current engine option.
- 5Initialism of city engineering office.
This word in other languages
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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Using “CEO”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-E-O - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “co” - see the side-by-side comparison. CEO vs co
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.