usance vs Americanism

usance and Americanism both are nouns.

Word	Noun	Adjective	Verb	Adverb
usance	Yes	No	No	No
Americanism	Yes	No	No	No

As nouns, Americanism is a hyponym of usance; that is, Americanism is a word with a more specific, narrower meaning than usance:

Other hyponyms of usance include Anglicism, Britishism, consuetude, couvade, Germanism, habit, use, hijab, rite, ritual.

usance (noun)	Americanism (noun)
accepted or habitual practice	a custom that is peculiar to the United States or its citizens
(economics) the utilization of economic goods to satisfy needs or in manufacturing	loyalty to the United States and its institutions
the period of time permitted by commercial usage for the payment of a bill of exchange (especially a foreign bill of exchange)	an expression that is characteristic of English as spoken by Americans