Following are all the thickheaded like words, in the list below.
FATHEADED
100% like thickheaded
BONEHEADED
100% like thickheaded
BLOCKHEADED
100% like thickheaded
LOGGERHEADED
100% like thickheaded
WOODEN-HEADED
100% like thickheaded
THICK-SKULLED
100% like thickheaded
STUPID
100% like thickheaded
THICK
99.77% like thickheaded
DENSE
66.58% like thickheaded
DICKHEADED
33.44% like thickheaded
SHITHEADED
33.44% like thickheaded
DUMB
33.44% like thickheaded
THICK AS A PLANK
33.44% like thickheaded
BUBBLEHEADED
33.44% like thickheaded
FUCKHEADED
33.44% like thickheaded
DUMBISH
33.44% like thickheaded
THICK AS A BRICK
33.44% like thickheaded
THICK AS CHAMP
33.44% like thickheaded
THICK AS TWO SHORT PLANKS
33.44% like thickheaded
HAMMER-HEADED
33.44% like thickheaded
THICK AS PIGSHIT
33.44% like thickheaded
KNUCKLEHEADED
33.44% like thickheaded
DATELESS
33.44% like thickheaded
EGGHEADED
33.44% like thickheaded
NUMBSKULLED
33.44% like thickheaded
THICK AS A WHALE OMELETTE
33.44% like thickheaded
STUPIDISH
33.44% like thickheaded
RETARDED
33.44% like thickheaded
DUMBASSED
33.44% like thickheaded
SMOOTH-BRAINED
33.44% like thickheaded
FUCKTARDED
33.44% like thickheaded
DUMBSHIT
33.44% like thickheaded
DUMBASS
33.44% like thickheaded
DUMB AS DIRT
33.44% like thickheaded
COCKBRAINED
33.44% like thickheaded
BOOBYISH
33.44% like thickheaded
PUDDING-HEADED
33.44% like thickheaded
PINHEADED
33.44% like thickheaded
SHITBRAINED
33.44% like thickheaded
DUMB LIKE A FOX
33.44% like thickheaded
DUMB AS AN OX
33.44% like thickheaded
MEATHEADED
33.44% like thickheaded
MUTTONHEADED
33.44% like thickheaded
BOOFHEADED
33.44% like thickheaded
THICK AS MINCE
33.44% like thickheaded
DUMB AS A BAG OF HAMMERS
33.44% like thickheaded
FOOL
33.44% like thickheaded
SHIT-FOR-BRAINS
33.44% like thickheaded
SLAPHEADED
33.44% like thickheaded
CHUMPY
33.44% like thickheaded
DOOFY
33.44% like thickheaded
BEE-BRAINED
33.44% like thickheaded
DUMB AS NAILS
33.44% like thickheaded
DUMB-ASS
33.44% like thickheaded
STUPIDASS
33.44% like thickheaded
DUMBER THAN A BOX OF ROCKS
33.44% like thickheaded
BOOFHEAD
33.44% like thickheaded
DEAD FROM THE NECK UP
33.44% like thickheaded
DUMB AS A ROCK
33.44% like thickheaded
DUMB AS A BOX OF ROCKS
33.44% like thickheaded
DUMB AS A DOORKNOB
33.44% like thickheaded
MUFFISH
33.44% like thickheaded
SEMIDUMB
33.44% like thickheaded
COCKEYED
33.44% like thickheaded
MIDGET-MINDED
33.44% like thickheaded
DAMNFOOL
33.44% like thickheaded
FLEA-BRAINED
33.44% like thickheaded
POKY
33.44% like thickheaded
DAFT
33.44% like thickheaded
TOMFOOL
33.44% like thickheaded
SMART-ARSED
33.44% like thickheaded
TWATTISH
33.44% like thickheaded
TWATTY
33.44% like thickheaded
SLAP-HEADED
33.44% like thickheaded
DUMB AS A SACK OF HAMMERS
33.44% like thickheaded
ASSHATTY
33.44% like thickheaded
ROCK-DUMB
33.44% like thickheaded
DUNNY
33.44% like thickheaded
STUNOD
33.44% like thickheaded
PEABRAIN
33.44% like thickheaded
DUMBBUTT
33.44% like thickheaded
RETARDICAL
33.44% like thickheaded
STUUUPID
33.44% like thickheaded
TWATLIKE
33.44% like thickheaded
FUCKWITTED
33.44% like thickheaded
GOOSY
33.44% like thickheaded
BLOCKHEADISH
33.44% like thickheaded
DINGBATTY
33.44% like thickheaded
LOOPY
33.44% like thickheaded
BLOCKHEADLY
33.44% like thickheaded
KNOBBISH
33.44% like thickheaded
HUMPTY
33.44% like thickheaded
FUNNY IN THE HEAD
33.44% like thickheaded
DICKED
33.44% like thickheaded
BONKERS
33.44% like thickheaded
DERPY
33.44% like thickheaded
GLUGGY
33.44% like thickheaded
NITTY
33.44% like thickheaded
DICKISH
33.44% like thickheaded
BATCHY
33.44% like thickheaded