As nouns the difference between cowardliness and bravery
is that cowardliness is the characteristic of being cowardly while bravery is (usually|uncountable) being brave, courageousness.
cowardliness
English
Noun
(en-noun)
The characteristic of being cowardly.
A cowardly action.
bravery
English
Noun
(en-noun)
(usually, uncountable) Being brave, courageousness.
(countable) A brave act.
Synonyms
* (being brave) bravehood, braveness, courageousness, fearlessness; courage, pluck, valor; see also