eating vs uptake

eating and uptake both are nouns.

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

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

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

Other hypernyms of eating include consumption, ingestion, intake.

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