be disappointing, be found wanting, be inferior, be insufficient, collapse, come short, crash, decline, fail, fail of, fall, fall away, fall dead, fall down, fall flat, fall in, fall shy, fall stillborn, fall through, fizzle, fizzle out, follow, go to smash, go wrong, have nothing on, kick the beam, lack, lag, lose ground, miss, miss out, miss the mark, not answer, not approach, not bear inspection, not come near, not compare, not hack it, not make it, not make out, not measure up, not pass muster, not qualify, not stretch, not suffice, peter out, play second fiddle, rank under, run short, serve, slump, stop short, subserve, turn sour, want
be imperfect, have a defect, lie under a disadvantage, spring a leak, not pass muster, barely pass muster, fall short
come short of, fall short
of, stop short of, come short, fall short
, stop short, not reach, want, keep within bounds, keep within the mark, keep within the compass, break down, stick in the mud, collapse, flat out, come to nothing, fall through, fall to the ground, cave in, end in smoke, miss the mark, fail, lose ground, miss stays.