polydactyl vs biological science

polydactyl is not a noun while biological science is a noun.

Word	Noun	Adjective	Verb	Adverb
polydactyl	No	Yes	No	No
biological science	Yes	No	No	No

polydactyl (noun)	biological science (noun)
	the science that studies living organisms

polydactyl (adjective)	biological science (adjective)
of or relating to a person (or other vertebrate) having more than the normal number of digits