geology vs anaclinal

geology is a noun but anaclinal is not a noun.

Word	Noun	Adjective	Verb	Adverb
geology	Yes	No	No	No
anaclinal	No	Yes	No	No

geology (noun)	anaclinal (noun)
a science that deals with the history of the earth as recorded in rocks

geology (adjective)	anaclinal (adjective)
	of valleys and rivers; progressing in a direction opposite to the dip in surrounding rock strata