loggerheaded vs fatheaded

loggerheaded and fatheaded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
loggerheaded	No	Yes	No	No
fatheaded	No	Yes	No	No

As adjectives, loggerheaded and fatheaded are synonyms defined as:

Other synonyms of loggerheaded include blockheaded, boneheaded, duncical, duncish, thick-skulled, thick, thickheaded, wooden-headed.

loggerheaded (adjective)	fatheaded (adjective)
(used informally) stupid	(used informally) stupid