The Collaborative International Dictionary of English v.0.48:
Heartiness \Heart"i*ness\ (h[aum]rt"[i^]*n[e^]s), n. The quality of being hearty; as, the heartiness of a greeting. [1913 Webster]WordNet (r) 3.0 (2006):
heartiness n 1: active strength of body or mind [syn: vigor, vigour, dynamism, heartiness] 2: the quality of hearty sincerity [syn: heartiness, wholeheartedness]