wooden-headed vs thick-skulled

wooden-headed and thick-skulled both are adjectives.

Word	Noun	Adjective	Verb	Adverb
wooden-headed	No	Yes	No	No
thick-skulled	No	Yes	No	No

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

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

wooden-headed (adjective)	thick-skulled (adjective)
(used informally) stupid	(used informally) stupid