fatheaded vs wooden-headed

fatheaded and wooden-headed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fatheaded	No	Yes	No	No
wooden-headed	No	Yes	No	No

As adjectives, fatheaded and wooden-headed are synonyms defined as:

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

fatheaded (adjective)	wooden-headed (adjective)
(used informally) stupid	(used informally) stupid