co-operation
"co-operation" is a 11-letter English headword indexed on PlainSpell.
The verdict
“co-operation” is outside the top-ranked English vocabulary, used as a noun - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 12
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Alternative spelling of cooperation.
| Property | Value |
|---|---|
| Headword | co-operation |
| Language | English |
| Part of speech | Noun |
| Letters | 12 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “co-operation” sits in English frequency
Spelling & Dictionary Insight
The English entry for co-operation is 12 letters long, classified as a noun. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "Alternative spelling of cooperation.".
We couldn't generate a plausible misspelling set for co-operation, since its letter pattern doesn't lend itself to common typo substitutions. This entry stands alone in our confusable dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
This entry carries no recorded etymology, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is co-operation, spelled C-O---O-P-E-R-A-T-I-O-N.
Definition
- 1Alternative spelling of cooperation.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "co-operation"?
What does "co-operation" mean?
What language does "co-operation" come from?
Is PlainSpell free to use?
Using “co-operation”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-O---O-P-E-R-A-T-I-O-N - every other letter order is a misspelling in standard orthography.
- 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.