mollusc
/ˈmɒləsk/
"mollusc" is a 7-letter English headword indexed on PlainSpell.
The verdict
“mollusc” is uncommon English (frequency #79,769 among 4,057 “M” headwords), classed as a noun. The kind of spelling people second-guess.
- #79,769
- frequency rank, English
- 4,057
- “M” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A soft-bodied invertebrate of the phylum Mollusca, typically with a hard shell of one or more pieces.
Corpus desk
Index EN-mollusc · mollusc · English
mollusc · rank #79,769 · 0 variants · 0 confusables
- FREQ-RARE #79,769
- LEN-LONG 7 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,057
- PHOTO-FINISH moka
Nearest frequency peer: moka (-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 “mollusc”
Sparse band: bars invert rank so rarer forms read shorter
- Mizrahi
Mizrahi
20,236 corpus weight
- moka
moka
20,233 corpus weight
- mollusc
mollusc
20,232 corpus weight
- mourne
mourne
20,230 corpus weight
- MTD
MTD
20,229 corpus weight
- multidrug
multidrug
20,228 corpus weight
What this shows Long-tail view: where “mollusc” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | mollusc |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈmɒləsk/ |
| Letters | 7 |
| Frequency rank | #79,769 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “mollusc” in English
Rare enough to double-check
mollusc is uncommon English at frequency #79,769 among 4,057 “M” headwords, classed as anoun, transcribed /ˈmɒləsk/. Rarity is why readers land here mid-draft. 2 senses are on record.
mollusc doesn't appear in our generated misspelling index, and the word's spelling is regular enough that our generator found nothing worth flagging. Our dataset records no confusable match here, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: Borrowed from French mollusque, from New Latin Mollusca (phylum name), from Latin molluscus (“thin-shelled”), from mollis (“soft”). The correct English form is mollusc, spelled M-O-L-L-U-S-C.
Definition
- 1A soft-bodied invertebrate of the phylum Mollusca, typically with a hard shell of one or more pieces.
- 2A weak-willed person.
Recorded use
Wiktionary examplesThese source excerpts show how mollusc appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
bivalve molluscs
For example, the antitumour depsipeptide kahalalide F was isolated from the opisthobranch mollusc Elysia rufescens, and is used by both the mollusc and its dietary alga Bryopsis spp.
Etymology
Borrowed from French mollusque, from New Latin Mollusca (phylum name), from Latin molluscus (“thin-shelled”), from mollis (“soft”).
Synonyms
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); 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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "mollusc", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 7 letters (nearest by frequency rank).