domestic animal - any of various domesticated animals

consumer - a person who uses goods or services

devourer - someone who eats greedily or voraciously

diner - a person eating a meal (especially in a restaurant)

dunker - an eater who dips food into a liquid before eating it; "he was a dunker--he couldn't eat a doughnut without a cup of coffee to dunk it in"

glutton, gourmand, trencherman - a person who is devoted to eating and drinking to excess

gobbler - a hasty eater who swallows large mouthfuls

luncher - someone who is eating lunch

mouth - a person conceived as a consumer of food; "he has four mouths to feed"

mycophagist - a person who eats fungi (especially mushrooms)

nosher, snacker - someone who eats lightly or eats snacks between meals

omnivore - a person who eats all kinds of foods

picknicker, picnicker - a person who is picnicking

gorger, scoffer - someone who eats food rapidly and greedily

vegetarian - eater of fruits and grains and nuts; someone who eats no meat or fish or (often) any animal products

branch - a stream or river connected to a larger one

machine - any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks