outage vs indefinite quantity

outage and indefinite quantity both are nouns.

Word	Noun	Adjective	Verb	Adverb
outage	Yes	No	No	No
indefinite quantity	Yes	No	No	No

As nouns, indefinite quantity is a hypernym of outage; that is, indefinite quantity is a word with a broader meaning than outage:

outage: the amount of something (as whiskey or oil) lost in storage or transportation
indefinite quantity: an estimated quantity

outage (noun)	indefinite quantity (noun)
a temporary suspension of operation (as of computers)	an estimated quantity
the amount of something (as whiskey or oil) lost in storage or transportation