Adjective : Cheating is dishonorable. ,a dishonorable man.    From Dictionary.com. 

Nothing, except that strange notion of the "dishonorableness" of asking a woman's love when one has nothing but love to give her in return.    From Wordnik.com.  [The Laurel Bush] Reference

The man who has learned to take pride in making sacrifice hits is ripe to respond to the growing sense of the dishonorableness of making personal profit the aim of business or of politics.    From Wordnik.com.  [Problems of Conduct] Reference

"O Papa, never mind about the dishonorableness," said Adelaide.    From Wordnik.com.  [The Happiest Time of Their Lives] Reference

This country has had enough, from the bottom up, and back down again, of ignorance, stupidity and, most importantly, dishonorableness.    From Wordnik.com.  [WordPress.com News] Reference