Collocations for forehead - noun

broad, high, wide
sloping
furrowed, wrinkled
smooth
sweaty

crease, wrinkle
mop, wipe
hit, rub, slap, smack, tap
He groaned and slapped his forehead, as if suddenly remembering something obvious.

kiss

across your forehead
He rubbed a hand across his forehead as though he were tired.

from your forehead
He wiped the sweat from his forehead.

in the forehead
He had a gash in the forehead.

off your forehead
She pushed her wet hair off her forehead.

over your forehead
His hair fell over his forehead.