animal

antisterility

ashcan

audio

colt

debris

dirt

dirty

dustbin

dusthole

eat

eating

ecological

ecology

epidemic

equine

fill

food

garbage

have

heap

horse

household

junk

junkyard

landfill

litter

lumber

meal

mess

ordure

plastic

pollute

pollution

recycle

recycling

refuse

rubbish

sanitary

scrap

scrapheap

sound

spoil

stallion

steed

stud

sweeping

take

trash

waste