agiotage vs agio

agiotage and agio both are nouns.

Word	Noun	Adjective	Verb	Adverb
agiotage	Yes	No	No	No
agio	Yes	No	No	No

As nouns, agiotage and agio are synonyms defined as:

Other synonyms of agiotage include exchange premium, premium.

agiotage (noun)	agio (noun)
a fee charged for exchanging currencies	a fee charged for exchanging currencies
speculative dealing in stock exchange securities or foreign exchange.