coinage vs mintage

coinage and mintage both are nouns.

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

As nouns, coinage and mintage are synonyms defined as:

Other synonyms of coinage include metal money, specie.

coinage (noun)	mintage (noun)
the act of inventing a word or phrase	act or process of minting coins
a newly invented word or phrase	coins collectively
coins collectively	fee paid to a mint by the government for minting a coin