alternate
beating
cadenced
cadent
circling
cyclic
epochal
even
every other
full
in numbers
in rhythm
intermittent
isochronal
measured
mellow
metric
metronomic
oscillatory
palpitant
periodical
pitapat
plangent
pulsatile
pulsating
pulsative
pulsatory
reciprocal
recurrent
recurring
resonant
resonating
rhythmic
rich
rolling
rotary
seasonal
serial
sonorous
staccato
steady
throbbing
undulant
undulatory
vibrant
vibrating
wavelike
wheeling
undulation
wave
repulsing