chiton vs polyplacophore

chiton and polyplacophore both are nouns.

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

As nouns, chiton and polyplacophore are synonyms defined as:

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

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

chiton (noun)	polyplacophore (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