| noun | the motion made by flapping up and down |
| verb | move in a wavy pattern or with a rising and falling motion “The curtains undulated” |
| verb | move noisily “flags flapped in the strong wind” |
| verb | move with a thrashing motion “The bird flapped its wings” |
| verb | move with a flapping motion “The bird's wings were flapping” |
| verb | make a fuss; be agitated |
| verb | pronounce with a flap, of alveolar sounds |
| flap | verb | move with a flapping motion |
| flutter | verb | move back and forth very rapidly |
| roller | noun | a long heavy sea wave as it advances towards the shore |
| undulation | noun | wavelike motion; a gentle rising and falling in the manner of waves |
| flap | noun | the motion made by flapping up and down |
| flapping | noun | the motion made by flapping up and down |
| wave | noun | a movement like that of a sudden occurrence or increase in a specified phenomenon |
| beat | noun | a regular rate of repetition |
| dither | noun | an excited state of agitation |
| pother | noun | an excited state of agitation |