structural vs geology

structural is not a noun while geology is a noun.

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

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

structural (adjective)	geology (adjective)
relating to or having or characterized by structure
relating to or caused by structure, especially political or economic structure
relating to or concerned with the morphology of plants and animals
pertaining to geological structure
concerned with systematic structure in a particular field of study
affecting or involved in structure or construction