hermit crab

noun

"hermit-crab" is a 10-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
11
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A decapod crustacean (not a true crab) from the superfamily Paguroidea, which salvages empty seashells or other portable objects to permanently shelter and protect its soft abdomen.

Corpus desk

Index EN-hermit-crab · hermit crab · English

hermit crab · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 11 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "H" 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 hermit crab
PropertyValue
Headwordhermit crab
LanguageEnglish
Part of speechNoun
Letters11
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “hermit crab” in English

hermit crabsits 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

hermit crab is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A decapod crustacean (not a true crab) from the superfamily Paguroidea, which salvages empty seashells or other portable objects to permanently shelter and protect its soft abdomen.".

Our edit-distance generator produced no likely misspellings for hermit crab, which points to an orthography that plays by predictable English rules. This entry stands alone in our confusable dataset, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

This headword's origin isn't recorded in our source data, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct English form is hermit crab, spelled H-E-R-M-I-T- -C-R-A-B.

Definition

  1. 1
    A decapod crustacean (not a true crab) from the superfamily Paguroidea, which salvages empty seashells or other portable objects to permanently shelter and protect its soft abdomen.

Recorded use

Wiktionary example

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

  1. In the U.S., Akers would like to see all hermit crabs legally reclassified as exotic pets, like an alligator or an ocelot, so their sale and ownership could be regulated. To her, every crab’s life is precious.

This word in other languages

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 "hermit crab"?
"hermit crab" is spelled H-E-R-M-I-T- -C-R-A-B.
What does "hermit crab" mean?
As a noun, "hermit crab" means: A decapod crustacean (not a true crab) from the superfamily Paguroidea, which salvages empty seashells or other portable objects to permanently shelter and protect its soft abdomen.
What language does "hermit crab" come from?
"hermit crab" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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