zoological science vs plastron

zoological science and plastron both are nouns.

Word	Noun	Adjective	Verb	Adverb
zoological science	Yes	No	No	No
plastron	Yes	No	No	No

zoological science (noun)	plastron (noun)
the branch of biology that studies animals	(zoology) the part of a turtle's shell forming its underside
	a large pad worn by a fencer to protect the chest
	a metal breastplate that was worn under a coat of mail
	the front of man's dress shirt
	the ornamental front of a woman's bodice or shirt