cock-up

noun

"cock-up" is a 6-letter English headword indexed on PlainSpell.

The verdict

“cock-up” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
7
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A mistake.

Corpus desk

Index EN-cock-up · cock-up · English

cock-up · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 7 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "C" thin
  • PHOTO-UNK Peer pending

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.

Key facts for cock-up
PropertyValue
Headwordcock-up
LanguageEnglish
Part of speechNoun
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “cock-up” in English

cock-upsits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

cock-up is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.

cock-up has no tracked misspelling variants, suggesting the orthography follows predictable English patterns. No confusable counterpart is on file for this word, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

Etymologically, the entry records: A deverbal from cock up. The correct English form is cock-up, spelled C-O-C-K---U-P.

Definition

  1. 1
    A mistake.
  2. 2
    A superior letter; a lower-case letter placed above the baseline and made smaller than ordinary script; traditionally used in abbreviations.
  3. 3
    A roll or twist of hair worn at the nape of the neck; a bun.

Recorded use

Wiktionary examples

These source excerpts show how cock-up appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. If the zodiac was already developed in 2000 BC, it must have been kept as a cult secret or in some non-Babylonian country; this would be a 1500-year conspiracy theory. More likely is the individual cockup theory, viz. the naivety of Eudoxus himself.
  2. And I'm sorry for all the cock-ups, my cabinet are absolute crap. We'll have to do better next year.

Etymology

A deverbal from cock up.

Synonyms

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 "cock-up"?
"cock-up" is spelled C-O-C-K---U-P.
What does "cock-up" mean?
As a noun, "cock-up" means: A mistake.
What is the origin of the word "cock-up"?
A deverbal from cock up. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list