The Collaborative International Dictionary of English v.0.48:
distressfulness \distressfulness\ n. the quality of causing mental anguish. Syn: seriousness. [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
distressfulness n 1: the quality of arousing fear or distress; "he learned the seriousness of his illness" [syn: seriousness, distressfulness]