zoological science vs pallium

zoological science and pallium both are nouns.

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

zoological science (noun)	pallium (noun)
the branch of biology that studies animals	cloak or mantle worn by men in ancient Rome
	(Roman Catholic Church) vestment consisting of a band encircling the shoulders with two lappets hanging in front and back
	(zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell
	the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum