vacuous Synonyms

hollow mindless empty witless void vapid vacant untenanted unexpressive toom thoughtless thick stupid unoccupied airheaded pea-brained lamebrained unintelligent imbecilic birdbrained moronic meaningless wooden-headed thickheaded boneheaded dopey empty-headed slow silly purposeless devoid dense daft cretinous crazy brainless bovine blank barren bare dim doltish dozy objectless insipid inane ignorant idiotic foolish fatuous