eating vs consumption

eating and consumption both are nouns.

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

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

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

Other hypernyms of eating include ingestion, intake, uptake.

eating (noun)	consumption (noun)
the act of consuming food	the act of consuming something
	the process of taking food into the body through the mouth (as by eating)
	(economics) the utilization of economic goods to satisfy needs or in manufacturing
	involving the lungs with progressive wasting of the body