Antonyms of coward :
Examples of usage:
I shall not rest until the coward who killed him has been brought to justice!" "The Crevice", William John Burns and Isabel Ostrander.
To ask a chap to do a noble deed and in the same breath to tell him he is a coward! "Harding's luck", E. [Edith] Nesbit.
He don't fight like no coward. "The Major", Ralph Connor.