ass vs jackass

ass and jackass both are nouns.

Word	Noun	Adjective	Verb	Adverb
ass	Yes	No	No	No
jackass	Yes	No	No	No

As nouns, jackass is a hyponym of ass; that is, jackass is a word with a more specific, narrower meaning than ass:

ass: hardy and sure-footed animal smaller and with longer ears than the horse
jackass: male donkey

Other hyponyms of ass include domestic ass, donkey, Equus asinus, jack, jennet, jenny, jenny ass, wild ass.

ass (noun)	jackass (noun)
slang for sexual intercourse	male donkey
hardy and sure-footed animal smaller and with longer ears than the horse	a man who is a stupid incompetent fool
the fleshy part of the human body that you sit on
a pompous fool