ingest vs drink

ingest is not a noun while drink is a noun.

Word	Noun	Adjective	Verb	Adverb
ingest	No	No	Yes	No
drink	Yes	No	Yes	No

As verbs, drink is a hyponym of ingest; that is, drink is a word with a more specific, narrower meaning than ingest:

ingest (noun)	drink (noun)
	the act of drinking alcoholic beverages to excess
	the act of swallowing
	any liquid suitable for drinking
	a single serving of a beverage
	any large deep body of water

ingest (verb)	drink (verb)
take up mentally	be fascinated or spell-bound by; pay close attention to
serve oneself to, or consume regularly	take in liquids
	consume alcohol
	drink excessive amounts of alcohol; be an alcoholic
	propose a toast to