precipitate

[1]	accelerate , hasten , speed (up) , advance , hurry , quicken , expedite , bring on/about , trigger , provoke , instigate , incite , facilitate , further , press , push forward
[2]	hurl , fling , cast , launch , project
[3]	come down , fall

adj.

[1]	headlong , violent , rapid , swift , quick , speedy , meteoric , fast
[2]	sudden , abrupt , unannounced , unexpected , unanticipated
[3]	rash , impetuous , hasty , volatile , hotheaded , careless , reckless , incautious , injudicious , foolhardy , impulsive , unrestrained
[4]	hasty , overhasty , precipitant , precipitous