alternation
beat
cyclicalness
doubling
duplication
echo
imitation
intermittence
intermittency
meter
oscillation
pendulum motion
periodicalness
periodicity
piston motion
plagiarism
pulsation
quotation
reappearance
rebirth
recurrence
redoubling
reduplication
reecho
regular wave motion
regurgitation
reincarnation
renewal
repetition
reproduction
resumption
return
rhythm
seasonality
undulation