intake vs eating

intake and eating both are nouns.

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

As nouns, eating is a hyponym of intake; that is, eating is a word with a more specific, narrower meaning than intake:

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

Other hyponyms of intake include feeding, deglutition, drink, swallow, suck, sucking, suction, drinking, imbibing, imbibition.

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