Learn That Word

Synonyms for Blasphemous (same or very similar meaning)

WordNet sense 1 (grossly irreverent toward what is held to be sacred):
profane, sacrilegious

WordNet sense 2 (showing lack of due respect or veneration):

WordNet sense 3 (characterized by profanity or cursing):

WordNet sense 4 ((of behavior or especially language) characterized by obscenity or indecency):

From the ODE community, based on WordNetadd/edit