Noun

• S: (n) waver (waver%1:04:00::), flutter (flutter%1:04:00::), flicker (flicker%1:04:00::) (the act of moving back and forth)
• S: (n) flutter (flutter%1:26:00::) (abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block)
• S: (n) disturbance (disturbance%1:26:00::), disruption (disruption%1:26:00::), commotion (commotion%1:26:00::), flutter (flutter%1:26:01::), hurly burly (hurly_burly%1:26:00::), to-do (to-do%1:26:00::), hoo-ha (hoo-ha%1:26:00::), hoo-hah (hoo-hah%1:26:00::), kerfuffle (kerfuffle%1:26:00::) (a disorderly outburst or tumult) "they were amazed by the furious disturbance they had caused"
• S: (n) flap (flap%1:11:01::), flapping (flapping%1:11:00::), flutter (flutter%1:11:01::), fluttering (fluttering%1:11:00::) (the motion made by flapping up and down)

Verb

• S: (v) flit (flit%2:38:00::), flutter (flutter%2:38:02::), fleet (fleet%2:38:01::), dart (dart%2:38:01::) (move along rapidly and lightly; skim or dart) "The hummingbird flitted among the branches"
• S: (v) flicker (flicker%2:38:00::), waver (waver%2:38:02::), flitter (flitter%2:38:00::), flutter (flutter%2:38:01::), quiver (quiver%2:38:04::) (move back and forth very rapidly) "the candle flickered"
• S: (v) flutter (flutter%2:38:03::) (flap the wings rapidly or fly with flapping movements) "The seagulls fluttered overhead"
• S: (v) palpitate (palpitate%2:38:00::), flutter (flutter%2:38:00::) (beat rapidly) "His heart palpitated"
• S: (v) bat (bat%2:29:00::), flutter (flutter%2:29:00::) (wink briefly) "bat one's eyelids"