| beat(verb, evolution, throb, drum, oscillate) |
| dither(verb, pause, sway, hesitate, ponder) |
| dummy(noun, supply, extra, agent, substitute) |
| jump |
| periodical(noun, regularity of recurrence periodicity) |
| pinch hitter(noun, expression, person, cover, informal) |
| reciprocal(adjective, correlation, in turn) |
| relief(noun, inferior, insignificant, minor, replacement) |
| shilly-shally(verb, change, alter, adjust, range) |
| shuttle(verb, change, shift, reverse, trade) |
| successive(adjective, in turn) |
| teeter-totter(verb, swing, fluctuate, vacillate, oscillate) |
| assistant(noun, substitute, replacement, alternative, deputy) |
| attorney(noun, agent, deputy) |
| compensate |
| consecutive(sequence, in turn) |
| correspond(verb, change, shift, reverse, trade) |
| counterfeit(noun, extra, substitute, auxiliary, supernumerary) |
| cyclical(adjective, regularity of recurrence periodicity) |
| different(adjective, substitute, alternative, other) |