coterminous

/kəˈtəː.mɪ.nəs/

//kəˈtəː.mɪ.nəs// adj

By · According to Wiktionary data (CC BY-SA) ·

"coterminous" is a 11-letter English headword indexed on PlainSpell.

The verdict

“coterminous” is uncommon English (frequency #95,855 among 5,599 “C” headwords), classed as an adjective. The kind of spelling people second-guess.

#95,855
frequency rank, English
5,599
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Meeting end to end or at the ends.

Corpus desk

Index EN-coterminous · coterminous · English

coterminous · rank #95,855 · 0 variants · 0 confusables

  • FREQ-RARE #95,855
  • LEN-MEGA 11 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH coto

Nearest frequency peer: coto (+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 “coterminous”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for coterminous
PropertyValue
Headwordcoterminous
LanguageEnglish
Part of speechAdjective
IPA/kəˈtəː.mɪ.nəs/
Letters11
Frequency rank#95,855
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “coterminous” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).coterminousfalls in this rarity band:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Rare peers in the same band: “coto” (#95,856), “cottonseed” (#95,857), “couper” (#95,858). Among 5,599 “C” headwords, “coterminous” is #95,855. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

coterminous is uncommon English at frequency #95,855 among 5,599 “C” headwords, classed as anadjective, transcribed /kəˈtəː.mɪ.nəs/. Rarity is why readers land here mid-draft. 4 senses are on record.

No misspelling variants are generated for coterminous in our index, which points to an orthography that plays by predictable English rules. No confusable counterpart is on file for this word, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From Latin conterminus, from con- (“with”) + terminus (“border, end”), equivalent to co- + terminous. The spelling with co- instead of con- is probably influenced by the related prefix co-. The correct English form is coterminous, spelled C-O-T-E-R-M-I-N-O-U-S.

Definition

  1. 1
    Meeting end to end or at the ends.
  2. 2
    Having matching boundaries; or, adjoining and sharing a boundary.
  3. 3
    Having the same scope, range of meaning, or extent in time.
  4. 4
    Said of linked or related property leases that expire together.

Recorded use

Wiktionary examples

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

  1. New York's borough of Brooklyn and Kings County are coterminous.
  2. To get a building warrant he had to show the plans to "coterminous proprietors", neighbours with whom his property shared a boundary.

Etymology

From Latin conterminus, from con- (“with”) + terminus (“border, end”), equivalent to co- + terminous. The spelling with co- instead of con- is probably influenced by the related prefix co-.

This word in other languages

limitrophe(Français)

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 "coterminous"?
"coterminous" is spelled C-O-T-E-R-M-I-N-O-U-S. The IPA pronunciation is /kəˈtəː.mɪ.nəs/.
What does "coterminous" mean?
As an adjective, "coterminous" means: Meeting end to end or at the ends.
How do you pronounce "coterminous"?
The IPA (International Phonetic Alphabet) transcription for "coterminous" is /kəˈtəː.mɪ.nəs/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "coterminous"?
From Latin conterminus, from con- (“with”) + terminus (“border, end”), equivalent to co- + terminous. The spelling with co- instead of con- is probably influenced by the related prefix co-. 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 "coterminous", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

conurbation#95,851contracture#95,849clenbuterol#95,830earthmoving#95,928

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

Source: FrequencyWords open word-frequency list