sucking vs intake

sucking and intake both are nouns.

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

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

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

Other hypernyms of sucking include consumption, ingestion, uptake.

sucking (noun)	intake (noun)
the act of sucking	the process of taking food into the body through the mouth (as by eating)
	the act of inhaling; the drawing in of air (or other gases) as in breathing
	an opening through which fluid is admitted to a tube or container