increase speed up develop swell multiply intensify climb accumulate attain spread wax escalate surge roll up proliferate enlarge heighten jump mount boom appreciate balloon snowball build up mushroom skyrocket burgeon bourgeon bulk peak redouble rocket inflate distend puff (up) blow up crest crescendo apiece aris assise caprice cerise decease https://www.youtube.com/watch?v=JwKJVEjXOtg