drinking vs ingestion

drinking and ingestion both are nouns.

Word	Noun	Adjective	Verb	Adverb
drinking	Yes	No	No	No
ingestion	Yes	No	No	No

As nouns, ingestion is a hypernym of drinking; that is, ingestion is a word with a broader meaning than drinking:

drinking: the act of consuming liquids
ingestion: the process of taking food into the body through the mouth (as by eating)

Other hypernyms of drinking include consumption, intake, uptake.

drinking (noun)	ingestion (noun)
the act of consuming liquids	the process of taking food into the body through the mouth (as by eating)
the act of drinking alcoholic beverages to excess