| verb | stir up (water) so as to form ripples |
| verb | occur in soft rounded shapes “The hills rolled past” |
| verb | move in a wavy pattern or with a rising and falling motion “The curtains undulated” |
| verb | increase and decrease in volume or pitch, as if in waves “The singer's voice undulated” |
| adjective | having a wavy margin and rippled surface |
| ripple | noun | a small wave on the surface of a liquid |
| rippling | noun | a small wave on the surface of a liquid |
| riffle | noun | a small wave on the surface of a liquid |
| roll | noun | a round shape formed by a series of concentric circles (as formed by leaves or flower petals) |
| 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 |