[1] : WordNet (r) 2.0

peter out
     v 1: end weakly; "the music just petered out--there was no proper
          ending" syn: taper off, fizzle out, fizzle
     2: use up all one's strength and energy and stop working; "at
        the end of the march, i pooped out" syn: poop out, run
        down, run out, conk out
see also:
taper off fizzle out fizzle poop out run down run out 
conk out 

[2] : Moby Thesaurus II by Grady Ward, 1.0

108 moby thesaurus words for "peter out":
   abate, bate, be annihilated, be consumed, be destroyed,
   be disappointing, be no more, be unproductive, be used up,
   be wiped out, blow, break, break down, burn out, cave in,
   cease to be, cease to exist, collapse, come apart, come short,
   come to naught, come to nothing, come unstuck, conk out, crack up,
   crumble, decline, die, die away, die out, diminish, disappear,
   disintegrate, dissolve, droop, drop, dry up, dwindle, evaporate,
   expire, fade, fade away, fade out, fail, faint, fall down,
   fall flat, fall short, fall through, fatigue, fizzle, fizzle out,
   flag, flee, fly, gasp, get bogged down, get hung up, get mired,
   get tired, give out, give way, go, go downhill, go soft,
   go to pieces, go wrong, grow weary, hang fire, hit the skids, jade,
   languish, leave no trace, lessen, lie fallow, melt away,
   not hack it, not make it, pant, pass, pass away, peg out, perish,
   pine, play out, poop out, puff, puff and blow, rebate, recede,
   run down, run dry, run out, sink, succumb, taper off, tire,
   turn sour, vanish, wane, waste, weaken, wear away, wear thin,
   weary, wheeze, wilt, yield

Bale Out >> B Words
Bale Out, definition of term: Bale Out
bale+out_pag1.html

Bawl Out >> B Words
Bawl Out, definition of term: Bawl Out
bawl+out_pag1.html

Bear Out >> B Words
Bear Out, definition of term: Bear Out
bear+out_pag1.html

Bail Out >> B Words
Bail Out, definition of term: Bail Out
bail+out_pag1.html

Back Out >> B Words
Back Out, definition of term: Back Out
back+out_pag1.html

Air Out >> A Words
Air Out, definition of term: Air Out
air+out_pag1.html

Ask Out >> A Words
Ask Out, definition of term: Ask Out
ask+out_pag1.html

Act Out >> A Words
Act Out, definition of term: Act Out
act+out_pag1.html