back to square one

adv 0.784

back to basics

adv 0.654

all over again

adv 0.589

back

adv 0.556

backward

adv 0.550

back to front

adv 0.533

backwards

adv 0.521

back and forth

adv 0.512

from the ground up

adv 0.510

again

adv 0.504