12
spineless(adjective, cowardly)
10
coward(noun, person, worry, individual, dread)
10
mammal(noun, animal, creature, being, living thing)
9
animal(noun, animal, creature, being, animate)
8
creature(noun, animal, being, beast, living thing)
7
reptile(noun, animal, living thing)
6
weak(adjective, cowardly)
5
amphibian(noun, animal, creature, fauna, being)
5
canine(noun, animal)
5
cowardly(adjective, cowardly)
5
quadruped
4
vertebrate(noun, animal, creature, being, beast)
4
brute(noun, animal, creature, being, beast)
4
organism(noun, creature, being, living thing)
3
beast(noun, animal, creature, being)
3
carnivore(noun, animal)
3
feline(noun, animal)
3
frail
3
herbivore(noun, animal)
3
impotent
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APASmart Define. (2015). invertebrate thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/invertebrate/thesaurus/synonyms
ChicagoSmart Define. 2015. "invertebrate thesaurus" https://smartdefine.org/invertebrate/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, invertebrate thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/invertebrate/thesaurus/synonyms>.
MLASmart Define. "invertebrate thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/invertebrate/thesaurus/synonyms>