Leprosity :: Leprosity (n.) The state or quality of being leprous or scaly; also, a scale..
Prosiliency :: Prosiliency (n.) The act of leaping forth or forward; projection.
Prosiness :: Prosiness (n.) The quality or state of being prosy; tediousness; tiresomeness.
Prosing :: Prosing (n.) Writing prose; speaking or writing in a tedious or prosy manner.
Prosiphon :: Prosiphon (n.) A minute tube found in the protoconch of ammonites, and not connected with the true siphon..