crack
there's a crack in this cup

crack down on
tomar medidas enérgicas contra

crack up
you crack me up!

crack-brained
disparatado

crack-up
esgotamento (mental ou físico)

dawn
...at the crack of dawn

doom
the day of doom / the crack of doom

fair
a fair crack of the whip

hair
hair crack

hairline
hairline crack

hard
hard nut to crack

joke
to crack a joke

nut
...nut to crack / a tough nut to

sand
sand crack

sconce
a crack on the sconce

thunder
.../ a crack of thunder / a crash of thunder / a roll of thunder

whip
to crack a whip

willow
crack willow