Horrent :: Horrent (a.) Standing erect, as bristles; covered with bristling points; bristled; bristling..
Horrible :: Horrible (a.) Exciting, or tending to excite, horror or fear; dreadful; terrible; shocking; hideous; as, a horrible sight; a horrible story; a horrible murder..
Horribleness :: Horribleness (n.) The state or quality of being horrible; dreadfulness; hideousness.
Horribly :: Horribly (adv.) In a manner to excite horror; dreadfully; terribly.