crack

[1]	snap
[2]	break , fracture , rupture , shiver , shatter , smash
[3]	fissure , craze , crackle , (US) alligator
[4]	check , break
[5]	snap
[6]	break through
[7]	snap
[8]	crack up , crock up , break up , collapse

[1]	cleft , break , fracture , crevice , fissure , chink , crevice , scissure , rift , gap , flaw , split , fissure , slit , cleft , split , check , rupture , breach
[2]	snap , gap , report , bang , clap , shot
[3]	moment , crevice , cranny , instant , time , fissure , chap , second
[4]	cracking , snap
[5]	shot
[6]	wisecrack , sally , quip
[7]	crack cocaine , tornado
[8]	fling , go , pass , whirl , offer
[9]	fracture , cracking

adj.

[1]	ace , A-one , first-rate , super , tiptop , topnotch , top-notch , tops