backbone Antonyms

timidity shakiness servitude serfdom roadside rind rim rider restraint requirement remorse rein shiver shuddering shudder suppleness subjugation subjection strappado stipulation stimulation solicitude slavery skirt side sickliness rand queasiness penitence panic palpitation overanxiety outskirt offshoot obverse nose neurasthenia nervosity nag perimeter periphery phase qualification pusillanimity purfle puniness proviso provision pressure presentiment