issuance vs issuing

issuance and issuing both are nouns.

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

As nouns, issuance and issuing are synonyms defined as:

issuance and issuing: the act of providing an item for general use or for official purposes (usually in quantity)

Other synonyms of issuance include issue.

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