miscarry

abort

slip

abort fall through

backslide blunder decline deteriorate fall fizzle flop flounder fold founder misfire miss

back wrong horse be defeated be demoted be found lacking be in vain be ruined break down come to naught come to nothing fall flat fall short go astray go down go down swinging go downhill go up in smoke go wrong hit bottom hit the skids lose control lose out lose status meet with disaster miss fire miss the boat miss the mark play into run aground turn out badly

accomplish achieve ascend build correct develop do well go up improve rise succeed