pallium vs zoological science

pallium and zoological science both are nouns.

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

pallium (noun)	zoological science (noun)
cloak or mantle worn by men in ancient Rome	the branch of biology that studies animals
(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