Synonyms for Sweetheart (same or very similar meaning)
WordNet sense 1 (a person loved by another person):
steady, trueloveWordNet sense 2 (a very attractive or seductive looking woman):
beauty, dish, knockout, looker, peach, ravisher, smasher, lulu, mantrap, stunnerWordNet sense 3 (blessed with privileges):
privilegedFrom the ODE community, based on WordNetadd/edit