std

(noun) a communicable infection transmitted by sexual intercourse or genital contact. Synonyms: venereal disease, VD, venereal infection, social disease, Cupid's itch, Cupid's disease, Venus's curse, dose, sexually transmitted disease, STD.

(noun) a doctor's degree in theology. Synonyms: Doctor of Sacred Theology, STD. Example: "Std is from the latin sanctae theologiae doctor."