sucking vs ingestion

sucking and ingestion both are nouns.

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

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

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

Other hypernyms of sucking include consumption, intake, uptake.

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