coinage vs invention

coinage and invention both are nouns.

Word	Noun	Adjective	Verb	Adverb
coinage	Yes	No	No	No
invention	Yes	No	No	No

As nouns, invention is a hypernym of coinage; that is, invention is a word with a broader meaning than coinage:

coinage (noun)	invention (noun)
the act of inventing a word or phrase	the act of inventing
a newly invented word or phrase	a creation (a new device or process) resulting from study and experimentation
coins collectively	the creation of something in the mind