thick-skulled Synonyms

blockheaded wooden-headed thickheaded fatheaded boneheaded thick loggerheaded duncish duncical obtuse dumb as an ox dumb as dirt feather-brained thick-witted as dumb as a bag of hammers as dumb as a box of rocks dumb as a box of rocks dimwitted dense doltish dumb empty-headed thick-headed stupid slow-witted as dumb as a doorknob