coterminous

Name: coterminous, English Word Data
Creator: Wiktionary
License: https://creativecommons.org/licenses/by-sa/4.0/

/kəˈtəː.mɪ.nəs/

//kəˈtəː.mɪ.nəs// adj

By PlainSpell · According to Wiktionary data (CC BY-SA) · analyzed May 6, 2026

The verdict

“coterminous” is uncommon English (frequency #95,855 among 43,570 “C” headwords), classed as an adjective. The kind of spelling people second-guess.

#95,855
frequency rank, English: 43,570
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Meeting end to end or at the ends.

Key facts for coterminous
Property	Value
Headword	coterminous
Language	English
Part of speech	Adjective
IPA	/kəˈtəː.mɪ.nəs/
Letters	11
Frequency rank	#95,855
Misspellings tracked	0
Confusable pairs	0
Source	Wiktionary (kaikki.org)

Where “coterminous” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). coterminous lands here:

#95,855

#1#100#1K#10K#100K

← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

coterminous is uncommon English at frequency #95,855 among 43,570 “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
Meeting end to end or at the ends.
2
Having matching boundaries; or, adjoining and sharing a boundary.
3
Having the same scope, range of meaning, or extent in time.
4
Said of linked or related property leases that expire together.

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.

Using “coterminous”

The practical upshot for anyone who landed here from a spell-check.

The one correct English spelling is C-O-T-E-R-M-I-N-O-U-S - every other letter order is a misspelling in standard orthography.
Say it as /kəˈtəː.mɪ.nəs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

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.