Synonyms for To and fro:

adj.

back and forth (adjective)
in and out, backwards and forwards, from side to side, forward and back, up and down, backward and forward, zigzag.

n.

heaving, Undulating, hither and thither, two-way, about. indecisiveness, wiggle, vibration, shake, hesitation, pause, vacillation, roll, decide, sway, toing and froing, Shilly-shally, irresolution, timidness, irresoluteness, oscillation, timidity, bounce, indecision, tentativeness, hesitancy, quiver, wobble. up and down, backwards and forwards, forward and back, from pillar to post, round and round, hitch and hike, from side to side, off-and-on, like buckets in a well, in and out, zigzag. to and fro (noun)
backward and forward.

v.

saw (verb)
up and down, backwards and forwards, forward and back, from pillar to post, round and round, hitch and hike, from side to side, off-and-on, like buckets in a well, in and out, zigzag.

Other synonyms:

indecisiveness, tentativeness, irresolution, two-way, irresoluteness, heaving. hesitation, vacillation, indecision, timidness, hesitancy. timidity. about. Other relevant words:
from pillar to post, in and out, backwards and forwards, about, round and round, forward and back, zigzag, backward and forward, hitch and hike, from side to side, hither and thither.