obligate vs biology

obligate is not a noun while biology is a noun.

Word	Noun	Adjective	Verb	Adverb
obligate	No	Yes	Yes	No
biology	Yes	No	No	No

obligate (noun)	biology (noun)
	the science that studies living organisms
	all the plant and animal life of a particular region
	characteristic life processes and phenomena of living organisms

obligate (adjective)	biology (adjective)
restricted to a particular condition of life

obligate (verb)	biology (verb)
bind by an obligation; cause to be indebted
commit in order to fulfill an obligation
force somebody to do something