I would suggest that to the degree cowardice expresses fear, courage mostly expresses anger.
It is the habit of properly outwardly acting upon passion, and 'passion' or 'joie de vivre' really are anger by another name. We have a horrible tendency to label emotions very prejudicially, and make most of the simplest default labels negative.
I lament this here -- What is it like to be happy? and should not repeat myself.
In Catholic folk-culture there is a traditional quadrature of virtues assigned to the Evangelists and linked to the "cross-quarters" of one configuration the elements: Courage, Prudence, Justice, and Temperance. The main line of those traditions indirectly encode Aristotle, so I think it is OK to argue from that viewpoint here.
From that perspective, fear leads one to Temperance by stalling potentially inappropriate action in the present and to Prudence by motivation from the fear of want in the long run. So it is not cowardice, if that lies exactly opposite Courage.
Anger in the same way, motivates both Courage and Justice, motivating both direct and indirect action against what is wrong and toward what is pleasing in an appropriate manner.
The two other "quarters" get mapped to "Sorrow" which motivates Justice and Temperance and "Shame" which motivates Courage and Prudence.