1) Harmfulness 2) Morbidity 3) Morbidness 4) Noisomeness 5) Unwholesomeness 1) Noisomeness 
noxiousness 1. The quality of being noxious. 2. Harmfulness; the quality that injures, impairs, or destroys. 2. The quality that corrupts or perverts; such as, the noxiousness of doctrines.