issuance vs supplying

issuance and supplying both are nouns.

Word	Noun	Adjective	Verb	Adverb
issuance	Yes	No	No	No
supplying	Yes	No	No	No

As nouns, supplying is a hypernym of issuance; that is, supplying is a word with a broader meaning than issuance:

issuance: the act of providing an item for general use or for official purposes (usually in quantity)
supplying: the activity of supplying or providing something

Other hypernyms of issuance include provision, supply.

issuance (noun)	supplying (noun)
the act of providing an item for general use or for official purposes (usually in quantity)	the activity of supplying or providing something