Stiff Stiff synonyms rigid stiff and rigid firm stiff and firm inflexible stiff and inflexible strong stiff and strong starchy stiff and starchy tight stiff and tight tough stiff and tough hard stiff and hard unyielding stiff and unyielding potent stiff and potent Full list of synonyms (2891) Stiff antonyms flexible stiff and flexible easy stiff and easy informal stiff and informal supple stiff and supple pliable stiff and pliable pliant stiff and pliant soft stiff and soft limp stiff and limp relaxed stiff and relaxed yielding stiff and yielding Full list of antonyms (166) Share this picture Share this image Share this picture Share this image