orology vs geology

orology and geology both are nouns.

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

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

orology: the science of mountains
geology: a science that deals with the history of the earth as recorded in rocks

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