ingestion vs suck

ingestion and suck both are nouns.

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

As nouns, suck is a hyponym of ingestion; that is, suck 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)
suck: the act of sucking

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

ingestion (noun)	suck (noun)
the process of taking food into the body through the mouth (as by eating)	the act of sucking

ingestion (verb)	suck (verb)
	give suck to
	draw into the mouth by creating a practical vacuum in the mouth
	take in, also metaphorically
	draw something in by or as if by a vacuum
	provide sexual gratification through oral stimulation
	be inadequate or objectionable
	attract by using an inexorable force, inducement, etc.