sucking vs uptake

sucking and uptake both are nouns.

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

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

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

Other hypernyms of sucking include consumption, ingestion, intake.

sucking (noun)	uptake (noun)
the act of sucking	the process of taking food into the body through the mouth (as by eating)
	a process of taking up or using up or consuming