twat vs jackass

twat and jackass both are nouns.

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

As nouns, twat and jackass are synonyms defined as:

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

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