Synonyms of alternating

1 Syllable
shift, sway
2 Syllables
follow, change, varying, changing, seesaw, yo-yo, vary, waver, alter
3 Syllables
exchange, seriate, rotate, fluctuate, relieve, succeeding
4 Syllables
ever-changing, substitute, intersperse, interchange, successive, vacillate, oscillate, shilly-shally