jackass vs twat

jackass and twat both are nouns.

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

As nouns, jackass and twat are synonyms defined as:

Other synonyms of jackass include bozo, cuckoo, fathead, goof, goofball, goose, zany.

jackass (noun)	twat (noun)
male donkey	obscene terms for female genitals
a man who is a stupid incompetent fool	a man who is a stupid incompetent fool