exogamous vs botany

exogamous is not a noun while botany is a noun.

Word	Noun	Adjective	Verb	Adverb
exogamous	No	Yes	No	No
botany	Yes	No	No	No

exogamous (noun)	botany (noun)
	the branch of biology that studies plants
	all the plant life in a particular region or period

exogamous (adjective)	botany (adjective)
pertaining to or characterized by the custom of marrying only outside the limits of a clan or tribe
characterized by or fit for fertilization by a flower that is not closely related