polydactylous vs biological science

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

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

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

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