Donkey
Part of speech: noun
Definition: A domestic animal, Equus asinus, similar to a horse. A stubborn person. A fool. A small auxiliary engine, also called donkey engine.
Jackass
Part of speech: proper noun
Definition: A jack and an ace as a starting hand in Texas hold 'em due to phonetic similarity
Part of speech: noun
Definition: A male donkey.A foolish or stupid person.An inappropriately rude or obnoxious person.
Part of speech: verb
Definition: To behave very obnoxiously.