co's

det

"co-s" is a 3-letter English headword indexed on PlainSpell.

The verdict

“co's” is uncommon English (frequency #50,428 among 5,599 “C” headwords), classed as a determiner. The kind of spelling people second-guess.

#50,428
frequency rank, English
5,599
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Belonging to co. Gender-neutral possessive adjective, grammatically equivalent to the gendered his and her and the singular their.

Corpus desk

Index EN-co-s · co's · English

co's · rank #50,428 · 0 variants · 0 confusables

  • FREQ-RARE #50,428
  • LEN-MID 4 letters
  • VOW-1 1 vowel
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH CMO

Nearest frequency peer: CMO (-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 “co's”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “co's” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for co's
PropertyValue
Headwordco's
LanguageEnglish
Part of speechDeterminer
Letters4
Frequency rank#50,428
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “co's” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).co'sfalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “CMO” (#50,427), “coachman” (#50,429), “cocking” (#50,430). Among 5,599 “C” headwords, “co's” is #50,428. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

co's is uncommon English at frequency #50,428 among 5,599 “C” headwords, classed as adeterminer. Rarity is why readers land here mid-draft. Gloss: "Belonging to co. Gender-neutral possessive adjective, grammatically equivalent to the gendered his and her and the singular their.".

We couldn't generate a plausible misspelling set for co's, a sign its spelling follows regular English conventions. This entry stands alone in our confusable dataset, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From co + -'s. The correct English form is co's, spelled C-O-'-S.

Definition

  1. 1
    Belonging to co. Gender-neutral possessive adjective, grammatically equivalent to the gendered his and her and the singular their.

Recorded use

Wiktionary examples

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

  1. Whether or not an individual changes co’s location on the sexual landscape, the sexual landscape itself might change, [...]
  2. A youngster of my own introduction had been rejected by an object of preadolescent craving and had killed coself by leaping at the ceiling of co’s quarters.

Etymology

From co + -'s.

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

How do you spell "co's"?
"co's" is spelled C-O-'-S.
What does "co's" mean?
As a determiner, "co's" means: Belonging to co. Gender-neutral possessive adjective, grammatically equivalent to the gendered his and her and the singular their.
What is the origin of the word "co's"?
From co + -'s. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "co's", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list