coat-of-mail shell vs chiton

coat-of-mail shell and chiton both are nouns.

Word	Noun	Adjective	Verb	Adverb
coat-of-mail shell	Yes	No	No	No
chiton	Yes	No	No	No

As nouns, coat-of-mail shell and chiton are synonyms defined as:

coat-of-mail shell and chiton: primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates

Other synonyms of coat-of-mail shell include polyplacophore, sea cradle.

coat-of-mail shell (noun)	chiton (noun)
primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates	primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates
	a woolen tunic worn by men and women in ancient Greece