oscillatory (adj.)

• alternate
• circling
• cyclic
• epochal
• even
• fluctuating
• harmonic
• intermittent
• isochronal
• measured
• oscillating
• pendulous
• periodic
• periodical
• reciprocal
• recurrent
• recurring
• resonant
• rhythmic
• rotary
• seasonal
• serial
• steady
• undulant
• undulatory
• vacillating
• vibratory
• wavelike
• wavering
• wheeling
• wobbly