List of unrepeatable synonyms and unrepeatable related words.
Fescennine, Rabelaisian, alone, bawdy, blue, dirty, filthy, foul, foul-mouthed, foul-spoken, foul-tongued, fulsome, impure, ithyphallic, lewd, lone, lurid, nasty, obscene, offensive, pornographic, raunchy, ribald, salacious, scurrile, scurrilous, singular, smoking-room, smutty, sole, solitary, solo, sultry, unchaste, unclean, unexampled, unique, unprintable, vile