1.  eater(n = noun.person) feeder - someone who consumes food for nourishment;
is a kind of consumer
has particulars: devourer, diner, dunker, glutton, gourmand, gourmandizer, trencherman, gobbler, luncher, mouth, mycophage, mycophagist, nosher, snacker, omnivore, picknicker, picnicker, gorger, scoffer, vegetarian
Derived forms verb eat₂, verb eat₁

2.  eater(n = noun.food) - any green goods that are good to eat; "these apples are good eaters"
is a kind of garden truck, green goods, green groceries, produce
Derived form verb eat₁

   One who, or that which, eats. [1913 Webster]

eater, n.
1 a person who eats (a big eater).
2 Brit. an eating apple etc.

bee eater, fire eater, flesh eater, honey eater, lotus eater, man eater, meat eater, plant eater, snow eater