1. crack, check, break, change

usage: become fractured; break or crack on the surface only; "The glass cracked when it was heated"

2. crack, sound, go

usage: make a very sharp explosive sound; "His gun cracked"

3. snap, crack, sound, go

usage: make a sharp sound; "his fingers snapped"

4. crack, hit

usage: hit forcefully; deal a hard blow, making a cracking noise; "The teacher cracked him across the face with a ruler"

5. break through, crack, pass, go through, go across

usage: pass through (a barrier); "Registrations cracked through the 30,000 mark in the county"

6. crack, crack, check, break

usage: break partially but keep its integrity; "The glass cracked"

7. snap, crack, break, separate, split up, fall apart, come apart

usage: break suddenly and abruptly, as under tension; "The pipe snapped"

8. crack, break in, break

usage: gain unauthorized access computers with malicious intentions; "she cracked my password"; "crack a safe"

9. crack up, crack, crock up, break up, collapse, suffer, sustain, have, get

usage: suffer a nervous breakdown

10. crack, tell, narrate, recount, recite

usage: tell spontaneously; "crack a joke"

11. crack, change, alter, modify

usage: cause to become cracked; "heat and light cracked the back of the leather chair"

12. crack, decompose, break up, break down

usage: reduce (petroleum) to a simpler compound by cracking

13. crack, change

usage: break into simpler molecules by means of heat; "The petroleum cracked"


1. chapped, cracked, roughened, rough (vs. smooth), unsmooth

usage: used of skin roughened as a result of cold or exposure; "chapped lips"

2. alligatored, cracked, rough (vs. smooth), unsmooth

usage: of paint or varnish; having the appearance of alligator hide

3. balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky, insane (vs. sane)

usage: informal or slang terms for mentally irregular; "it used to drive my husband balmy"

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See also: cracked (Dictionary)