[1] : WordNet (r) 2.0

swan song
     n : a final performance or effort especially before retirement
         syn: last hurrah
see also:
last hurrah 

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

124 moby thesaurus words for "swan song":
   ps, parthian shot, z, addendum, afterthought, apodosis, appendix,
   back matter, benefit, bill, catastrophe, ceasing, cessation,
   chant du cygne, choral service, chorus, coda, codicil, colophon,
   conclusion, consequence, consummation, continuance, continuation,
   crack of doom, culmination, curtain, curtains, death, death song,
   debut, decease, denouement, destination, destiny, doom,
   double take, dying words, effect, eisteddfod, end, end point,
   ending, entertainment, envoi, epilogue, eschatology, exhibit,
   exhibition, expiration, farewell performance, fate, final solution,
   final twitch, final words, finale, finality, finis, finish,
   flesh show, folk-music festival, folk-sing, follow-through,
   follow-up, goal, hootenanny, izzard, jam session, last,
   last breath, last gasp, last things, last trumpet, last words,
   latter end, music festival, musicale, omega, opera festival,
   parting shot, payoff, performance, period, peroration, postface,
   postfix, postlude, postscript, premiere, presentation, presentment,
   production, quietus, refrain, resolution, resting place,
   rock festival, second thought, sequel, sequela, sequelae,
   sequelant, sequent, sequitur, service of song, show, sing, sing-in,
   singfest, singing, stage presentation, stoppage, stopping place,
   subscript, suffix, supplement, tag, term, terminal, termination,
   terminus, theatrical performance, tryout, windup

Swan Song >> S Words
Swan Song, definition of term: Swan Song
swan+song_pag1.html

Swan >> S Words
Swan, definition of term: Swan
swan_pag1.html

Song >> S Words
Song, definition of term: Song
song_pag1.html

Swan Dive >> S Words
Swan Dive, definition of term: Swan Dive
swan+dive_pag1.html

Whistling Swan >> W Words
Whistling Swan, definition of term: Whistling Swan
whistling+swan_pag1.html

Torch Song >> T Words
Torch Song, definition of term: Torch Song
torch+song_pag1.html

Folk Song >> F Words
Folk Song, definition of term: Folk Song
folk+song_pag1.html

Song And Dance >> S Words
Song And Dance, definition of term: Song And Dance
song+and+dance_pag1.html