The Collaborative International Dictionary of English v.0.48:

Satirist \Sat"ir*ist\, n. [Cf. F. satiriste.]
   One who satirizes; especially, one who writes satire.
   [1913 Webster]

         The mighty satirist, who . . . had spread terror
         through the Whig ranks.                  --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

satirist
    n 1: a humorist who uses ridicule and irony and sarcasm [syn:
         satirist, ironist, ridiculer]

Moby Thesaurus II by Grady Ward, 1.0:

75 Moby Thesaurus words for "satirist":
   Meistersinger, Parnassian, arch-poet, ballad maker, balladmonger,
   banana, bard, beat poet, bucoliast, burlesquer, caricaturist,
   clown, comedian, comic, cutup, elegist, epic poet, epigrammatist,
   fili, funnyman, gag writer, gagman, gagster, humorist, idyllist,
   imagist, ironist, jester, joker, jokesmith, jokester, jongleur,
   lampooner, lampoonist, laureate, librettist, madcap, major poet,
   maker, minnesinger, minor poet, minstrel, modernist,
   occasional poet, odist, parodist, pasquinader, pastoral poet,
   pastoralist, poet, poet laureate, poetress, poison-pen writer,
   prankster, punner, punster, quipster, reparteeist, rhapsode,
   rhapsodist, scop, skald, sonneteer, symbolist, troubadour,
   trouveur, trovatore, vers libriste, vers-librist, wag, wagwit,
   wisecracker, wit, witling, zany