biological science vs tribe

biological science and tribe both are nouns.

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

biological science (noun)	tribe (noun)
the science that studies living organisms	a social division of (usually preliterate) people
	a federation (as of American Indians)
	group of people related by blood or marriage
	(biology) a taxonomic category between a genus and a subfamily