The Collaborative International Dictionary of English v.0.48:
Obscene \Ob*scene"\, a. [L. obscenus, obscaenus, obscoenus, ill
looking, filthy, obscene: cf. F. obsc['e]ne.]
1. Offensive to chastity or modesty; expressing or presenting
to the mind or view something which delicacy, purity, and
decency forbid to be exposed; impure; as, obscene
language; obscene pictures.
Words that were once chaste, by frequent use grew
obscene and uncleanly. --I. Watts.
2. Foul; fifthy; disgusting.
A girdle foul with grease binds his obscene attire.
3. Inauspicious; ill-omened. [R.] [A Latinism]
At the cheerful light,
The groaning ghosts and birds obscene take flight.
Syn: Impure; immodest; indecent; unchaste; lewd.
[1913 Webster] -- Ob*scene"ly, adv. --
Moby Thesaurus II by Grady Ward, 1.0:
172 Moby Thesaurus words for "obscene":
Cyprian, Fescennine, Paphian, Rabelaisian, abhorrent, abominable,
abusive, amoral, animal, aphrodisiomaniacal, atrocious, awful,
barnyard, base, bawdy, beastly, below contempt, beneath contempt,
blasphemous, blue, broad, calumniatory, calumnious, carnal,
clitoromaniacal, coarse, comminatory, concupiscent, contemptible,
contumelious, crass, crude, crusty, cursing, damnatory, debauched,
degenerate, denunciatory, despicable, detestable, dirty,
disgusting, dissolute, distasteful, dysphemistic, earthy,
epithetic, erotic, eroticomaniacal, erotomaniacal, evil,
excommunicative, excommunicatory, execrable, execratory, fetid,
filthy, fleshly, forbidding, foul, foul-mouthed, foul-spoken,
foul-tongued, foulmouthed, fulminatory, fulsome, gaudy, goatish,
gross, gynecomaniacal, hateful, heinous, hideous, horny, horrible,
hot, hysteromaniacal, ignoble, immodest, immoral, imprecatory,
improper, impure, indecent, indecorous, indelicate, inelegant,
insufferable, intolerable, ithyphallic, lascivious, lecherous,
lewd, libertine, libidinous, licentious, lickerish, loathsome,
loose, loud, lubricious, lurid, lustful, maledictory, malodorous,
mephitic, meretricious, miasmal, miasmic, nasty, nauseating,
nauseous, noisome, noxious, nymphomaniacal, objectionable,
obnoxious, odious, off color, offensive, outrageous, paw,
pornographic, priapic, profane, prurient, randy, rank, raunchy,
raw, rebarbative, repellent, repugnant, repulsive, revolting,
ribald, rich, risque, rocky, rough, rude, ruttish, salacious,
satyric, scabrous, scatologic, scatological, scurrile, scurrilous,
sensual, sexual, sexy, shameful, shameless, shocking, sickening,
smoking-room, smutty, stinking, suggestive, sultry, unchaste,
unclean, unpalatable, unprintable, unrepeatable, vile,
vituperative, vulgar, wanton, warm, wicked