twat vs goofball

twat and goofball both are nouns.

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

As nouns, twat and goofball are synonyms defined as:

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

twat (noun)	goofball (noun)
obscene terms for female genitals	a man who is a stupid incompetent fool
a man who is a stupid incompetent fool	a person who amuses others by ridiculous behavior