Antonyms of bravery:
cowardice, cowardliness, fear, fearfulness, fright, effeminacy, pusillanimity, timidity, tatters, disarray, dishabille, cold feet, faintheartedness, mousiness, timorousness, feebleness, softness, weakness, impotence, ineffectualness, hesitation, indecision, indecisiveness, irresolution, cravenness, dastardliness, poltroonery, spinelessness.
Examples of usage:
  1. He had a great and well- earned reputation for skill and bravery.
    "The War of Independence", John Fiske.
  2. With so much bravery, how can he allow such a civetcat as Edward Baliol to bear away the title, which is his by the double right of blood and virtue?"
    "The Scottish Chiefs", Jane Porter.
  3. These tempted me to trials of boyish bravery.
    "Confessions of Boyhood", John Albee.