WordNet sense 1 (a disorderly outburst or tumult):

commotion, disruption, disturbance, to-do, hoo-ha, hoo-hah, kerfuffle

WordNet sense 2 (the motion made by flapping up and down):

flap, fluttering, flapping

WordNet sense 3 (beat rapidly):

palpitate

WordNet sense 4 (move back and forth very rapidly):

flicker, quiver, waver, flitter

WordNet sense 5 (move along rapidly and lightly; skim or dart):

dart, fleet, flit

WordNet sense 6 (wink briefly):

bat