grazing vs eating

grazing and eating both are nouns.

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

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

Other hypernyms of grazing include feeding.

grazing (noun)	eating (noun)
the act of brushing against while passing	the act of consuming food
the act of grazing