issuance vs stock issue

issuance and stock issue both are nouns.

Word	Noun	Adjective	Verb	Adverb
issuance	Yes	No	No	No
stock issue	Yes	No	No	No

As nouns, stock issue is a hyponym of issuance; that is, stock issue is a word with a more specific, narrower meaning than issuance:

issuance: the act of providing an item for general use or for official purposes (usually in quantity)
stock issue: (corporation law) the authorization and delivery of shares of stock for sale to the public or the shares thus offered at a particular time

issuance (noun)	stock issue (noun)
the act of providing an item for general use or for official purposes (usually in quantity)	(corporation law) the authorization and delivery of shares of stock for sale to the public or the shares thus offered at a particular time