abide, bide, carry on, cease not, continue, drag on, endure, extend, go along, go on, hold, hold on, hold steady, jog on, keep, keep alive, keep at, keep at it, keep busy, keep driving, keep moving, keep on, keep trying, keep up, last, lengthen, linger, maintain, never cease, not accept compromise, peg away, perpetuate, persevere, persist, plug away, preserve, prolong, protract, remain, retain, run on, slog on, stagger on, stay, stay on, sustain, tarry