THESAURUS
stand fast
abide, be still, be unflappable, coast, die hard, dig in, freeze, get home free, hang in, hang in there, hang tough, hold fast, hold out, hold up, keep quiet, lie still, mark time, never say die, not back down, not breathe, not budge, not give up, not stir, not submit, remain, remain firm, remain motionless, repose, rest, ride it out, stand, stand firm, stand no nonsense, stand pat, stand still, stand the gaff, stay, stay it out, stay put, stick, stick fast, stick it out, take what comes, tarry, tread water, weather, weather the storm
ROGET THESAURUS
stand fast
Permanence
VB
let alone, let be, let it be, persist, remain, stay, tarry, rest, stet (copy editing) hold, hold on, last, endure, bide, abide, aby, dwell, maintain, keep, stand, stand still,
stand fast, subsist, live, outlive, survive, hold one's ground, keep one's ground, hold one's footing, keep one's footing, hold good.