homologous vs biological science

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

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

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

homologous (adjective)	biological science (adjective)
corresponding or similar in position or structure or function or characteristics; especially derived from an organism of the same species
having the same evolutionary origin but not necessarily the same function