never say die

63 Moby Thesaurus words for "never say die":
      be determined, be hopeful, be in earnest, be resolved, bear up,
      buckle down, buckle to, catch at straws, come up fighting,
      cross the Rubicon, die fighting, die hard, get along, get on,
      go for broke, go on, go on with, hang in, hang in there, hang on,
      hang tough, hold fast, hold on, hold out, hold up, keep at it,
      keep hope alive, keep hoping, keep up, knock on wood,
      live through it, live with it, make out, manage, mean business,
      not back down, not flag, not give up, not submit, not weaken,
      persevere, persist, remain firm, see it out, see it through,
      stand fast, stand up, stay it out, stay the distance, stay with it,
      stick, stick fast, stick it, stick it out, stick out, stick to it,
      stick with it, survive, sweat it out, take heart, take it,
      take the plunge, tough it out