1. Mere spiritedness or courage. Such as give some proof of animosity, audacity, and execution, those she [the crocodile] loveth. (Holland)
enmity be dormant or concealed, animosity is active enmity, inflamed by collision and mutual injury between opposing parties. The animosities which were continually springing up among the clans in Scotland kept that kingdom in a state of turmoil and bloodshed for successive ages. The animosities which have been engendered among Christian sects have always been the reproach of the church.
Such [writings] as naturally conduce to inflame hatreds and make enmities irreconcilable. (Spectator) [These] factions . . . Never suspended their animosities till they ruined that unhappy government. (Hume)