WordNet (r) 3.0 (2006):

sodomist
    n 1: someone who engages in anal copulation (especially a male
         who engages in anal copulation with another male) [syn:
         sodomite, sodomist, sod, bugger]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "sodomist":
   bugger, coprophiliac, erotomaniac, exhibitionist, fetishist,
   masochist, narcissist, necrophiliac, nymphomaniac, paraphiliac,
   pederast, pedophiliac, rapist, sadist, satyr, scotophiliac,
   sodomite, transvestite, voyeur, zoophiliac