wooden-headed vs thickheaded

wooden-headed and thickheaded both are adjectives.

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

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

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

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