economic geology vs geology

economic geology and geology both are nouns.

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

As nouns, geology is a hypernym of economic geology; that is, geology is a word with a broader meaning than economic geology:

economic geology: the branch of geology that deals with economically valuable geological materials
geology: a science that deals with the history of the earth as recorded in rocks

economic geology (noun)	geology (noun)
the branch of geology that deals with economically valuable geological materials	a science that deals with the history of the earth as recorded in rocks