steep-sided vs steep

steep-sided is not a noun while steep is a noun.

Word	Noun	Adjective	Verb	Adverb
steep-sided	No	Yes	No	No
steep	Yes	Yes	Yes	No

steep-sided (noun)	steep (noun)
	a steep place (as on a hill)

steep-sided (adjective)	steep (adjective)
having very steep sides	having a sharp inclination
	of a slope; set at a high angle
	greatly exceeding bounds of reason or moderation

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