Synonyms to knock on wood

catch at straws, ask for it, be hopeful, be rash, be reckless, carp, cavil, cut up, fault-find, find fault, go too far, keep hope alive, keep hoping, never say die, nitpick, pettifog, pick holes, pick to pieces, pull apart, pull to pieces, quibble, take exception, take heart, tear apart, tear to pieces, be determined, be in earnest, be resolved, bear up, buckle down, buckle to, 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 up, 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 it, take the plunge, tough it out