mule

nouns

hybrid offspring of a male donkey and a female horse; usually sterile
mule
is derived from
muleteer
is a member of
type genus of the Equidae: only surviving genus of the family Equidae
Equus, genus Equus
is a type of (narrower)
hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck
equid, equine
a slipper that has no fitting around the heel
mule, scuff