fathead

Harebrain is a related term of fathead.

As a noun fathead is

(derogatory) an idiot; a fool.

Bonehead is a related term of fathead.

As nouns the difference between bonehead and fathead

is that bonehead is (slang) someone who is stubborn, thick-skulled, or stupid while fathead is (derogatory) an idiot; a fool.

Scatterbrain is a related term of fathead.

As nouns the difference between scatterbrain and fathead

is that scatterbrain is a flighty, disorganized or forgetful person while fathead is (derogatory) an idiot; a fool.

Ninny is a related term of fathead.

As nouns the difference between ninny and fathead

is that ninny is a silly or foolish person while fathead is (derogatory) an idiot; a fool.

Fathead is a related term of numskull.

As nouns the difference between fathead and numskull

is that fathead is (derogatory) an idiot; a fool while numskull is (pejorative) a dunce, mentally dull or stupid person.

Wikidiffcom is likely misspelled.

Wikidiffcom has no English definition.

As a noun fathead is

an idiot; a fool.

Fathead is a related term of cretin.

As nouns the difference between fathead and cretin

is that fathead is (derogatory) an idiot; a fool while cretin is idiot, fool, bastard, fuckwit etc.

As an adjective cretin is

stupid; idiotic; foolish etc.

Fathead is a related term of moron.

As a noun fathead

is (derogatory) an idiot; a fool.

As a proper noun moron is

a commune in southwestern haiti.

Featherbrain is a related term of fathead.

As nouns the difference between featherbrain and fathead

is that featherbrain is while fathead is (derogatory) an idiot; a fool.

As nouns the difference between jackass and fathead

is that jackass is a male donkey while fathead is an idiot; a fool.

As a proper noun jackass

is a jack and an ace as a starting hand in Texas hold 'em due to phonetic similarity.

As a verb jackass

is to behave very obnoxiously.