WordNet sense 1 (physician and American Revolutionary leader; signer of the Declaration of Independence (1745-1813)):

Benjamin Rush

WordNet sense 2 (the swift release of a store of affective force):

bang, boot, charge, flush, kick, thrill

WordNet sense 3 (a sudden forceful flow):

spate, surge, upsurge

WordNet sense 4 (not accepting reservations):

first-come-first-serve

WordNet sense 5 (not reserved):

unreserved

WordNet sense 6 (cause to move fast or to rush or race):

race

WordNet sense 7 (step on it):

hasten, hie, hotfoot, speed, belt along, bucket along, cannonball along, pelt along, rush along

WordNet sense 8 (cause to occur rapidly):

stimulate, induce

WordNet sense 9 (done under pressure):

rushed

WordNet sense 10 (moving rapidly or performed quickly or in great haste):

hurried

WordNet sense 11 ((American football) an attempt to advance the ball by running into the line):

rushing

WordNet sense 12 (the act of moving hurriedly and in a careless manner):

haste, hurry

WordNet sense 13 (act or move at high speed):

festinate, look sharp