I. verb
Synonyms: fail 5, break, bust, fold
Antonyms: skyrocket
II. noun
1.
Synonyms: bang 2, blast, boom, burst, clap, crack, slam, smash, wham
2.
Synonyms: impact 1, bump, clash, collision, concussion, jar, jolt, percussion, shock, smash
3.
a wrecking or smashing especially of a vehicle
an air crash
Synonyms: crack-up, pileup, ||prang, smash, smashup, ||stramash, wreck
Related Word: accident; collision
4.
Synonyms: collapse 2, breakdown, crack-up, debacle, smash, smashup, wreck