The Collaborative International Dictionary of English v.0.48:

Endearment \En*dear"ment\, n.
   The act of endearing or the state of being endeared; also,
   that which manifests, excites, or increases, affection. "The
   great endearments of prudent and temperate speech." --Jer.
   Taylor.
   [1913 Webster]

         Her first endearments twining round the soul.
                                                  --Thomson.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "endearment":
   artful endearments, bait, baited trap, blandishments, caress,
   charm, come-on, decoy, decoy duck, drawcard, drawing card,
   ground bait, honeyed words, hook, lure, pat, snare, soft words,
   sweet nothings, sweet talk, trap