Nouns

(n)reversal, change of mind, flip-flop, turnabout, turnarounda decision to reverse an earlier decision
(n)flip-flop, thonga backless sandal held to the foot by a thong between the big toe and the second toe
(n)flip-flopan electronic circuit that can assume either of two stable states
(n)flip-flopa backward somersault

Verbs

(v)interchange, tack, switch, alternate, flip, flip-flopreverse (a direction, attitude, or course of action)