twat vs fathead

twat and fathead both are nouns.

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

As nouns, twat and fathead are synonyms defined as:

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

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