coinsurance

noun

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

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

The verdict

“coinsurance” is uncommon English (frequency #88,220 among 43,570 “C” headwords), classed as a noun. The kind of spelling people second-guess.

#88,220
frequency rank, English
43,570
“C” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The joint assumption of risk between the insurer and the insured party.

Key facts for coinsurance
PropertyValue
Headwordcoinsurance
LanguageEnglish
Part of speechNoun
Letters11
Frequency rank#88,220
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “coinsurance” 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). coinsurance lands here:

#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

coinsurance is uncommon English at frequency #88,220 among 43,570 “C” headwords, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.

We couldn't generate a plausible misspelling set for coinsurance, since its letter pattern doesn't lend itself to common typo substitutions. No confusable counterpart is on file for this word, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: From co- + insurance. The correct English form is coinsurance, spelled C-O-I-N-S-U-R-A-N-C-E.

Definition

  1. 1
    The joint assumption of risk between the insurer and the insured party.
  2. 2
    The amount paid by the insured in accordance with this risk sharing.
  3. 3
    The joint assumption of risk between multiple insurers.

Etymology

From co- + insurance.

This word in other languages

franquicia(Español)franchise(Français)Selbstbeteiligung(Deutsch)

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 "coinsurance"?
"coinsurance" is spelled C-O-I-N-S-U-R-A-N-C-E.
What does "coinsurance" mean?
As a noun, "coinsurance" means: The joint assumption of risk between the insurer and the insured party.
What is the origin of the word "coinsurance"?
From co- + insurance. 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 “coinsurance”

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

  • The one correct English spelling is C-O-I-N-S-U-R-A-N-C-E - every other letter order is a misspelling in standard orthography.
  • 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.

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

Source: FrequencyWords open word-frequency list