Answer:
The synonyms are abort, baffle, balk, bring to naught, bungle, cast down, chagrin, circumvent, come to nothing, dash, dash hopes, deceive, delude, disconcert, disenchant, disgruntle, dishearten, disillusion, dissatisfy, dumbfound, embitter, fail, fall down on, fall flat, fall short of, foil, founder, hamper, hinder, leave in the lurch, let down, miscarry, mislead, not show, put out, ruin prospects, stand up, tease, thwart, torment and vex.