WordNet (r) 3.0 (2006):

son of a bitch
    n 1: insulting terms of address for people who are stupid or
         irritating or ridiculous [syn: asshole, bastard,
         cocksucker, dickhead, shit, mother fucker,
         motherfucker, prick, whoreson, son of a bitch,
         SOB]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "son of a bitch":
   SOB, bastard, bugger, creep, fart, heel, hood, hooligan, jerk,
   louse, meanie, mother, pill, rat, shit, shithead, shitheel,
   stinkard, stinker, turd