Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun jackass

2 senses of jackass

Sense 1
fathead, goof, goofball, bozo, jackass, goose, cuckoo, twat, zany -- (a man who is a stupid incompetent fool)
       => fool, sap, saphead, muggins, tomfool -- (a person who lacks good judgment)

Sense 2
jack, jackass -- (male donkey)
       => ass -- (hardy and sure-footed animal smaller and with longer ears than the horse)