ingestion vs feeding

ingestion and feeding both are nouns.

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

As nouns, feeding is a hyponym of ingestion; that is, feeding is a word with a more specific, narrower meaning than ingestion:

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

Other hyponyms of ingestion include eating, deglutition, drink, swallow, suck, sucking, suction, drinking, imbibing, imbibition.

ingestion (noun)	feeding (noun)
the process of taking food into the body through the mouth (as by eating)	the act of consuming food
	the act of supplying food and nourishment