| ups and downs |
| undulate(verb, move, change, disturb, alter) |
| rhythm(noun, music, beat, flow, tempo) |
| billow(verb, swell, fill, roll, surge) |
| roll(verb, swell, fill, throw, pitch) |
| surge(verb, move, swell, fill, roll) |
| swell(noun, verb, move, fill, roll) |
| wave(verb, move, change, disturb, alter) |
| ebb and flow(noun, verb, expression, idiom, alter) |
| heave(verb, move, disturb, swell, fill) |
| toss(verb, swell, fill, throw, pitch) |
| comb |
| flow(noun, verb, move, music, time) |
| fluctuate(verb, move, change, alter, swell) |
| rise(swell, throb, palpitate) |
| alternate(verb, change, alter, swing, vary) |
| balloon(verb, swell, fill, heave, bulge) |
| be undecided(verb, change, alter, swing, vary) |
| belly(verb, swell, fill, heave, bulge) |
| bloat(verb, swell, fill, heave, bulge) |