polyplacophore vs chiton

polyplacophore and chiton both are nouns.

Word	Noun	Adjective	Verb	Adverb
polyplacophore	Yes	No	No	No
chiton	Yes	No	No	No

As nouns, polyplacophore and chiton are synonyms defined as:

polyplacophore and chiton: primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates

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

polyplacophore (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