steep vs abrupt

steep is a noun but abrupt is not a noun.

Word	Noun	Adjective	Verb	Adverb
steep	Yes	Yes	Yes	No
abrupt	No	Yes	No	No

steep (noun)	abrupt (noun)
a steep place (as on a hill)

steep (adjective)	abrupt (adjective)
having a sharp inclination	surprisingly and unceremoniously brusque in manner
of a slope; set at a high angle	marked by sudden changes in subject and sharp transitions
greatly exceeding bounds of reason or moderation	dangerously steep
	exceedingly sudden and unexpected

steep (verb)	abrupt (verb)
let sit in a liquid to extract a flavor or to cleanse
devote (oneself) fully to