WordNet sense 1 (striving to overcome in argument):

combative

WordNet sense 2 (involving competition or competitiveness):

competitory

WordNet sense 3 (subscribing to capitalistic competition):

free-enterprise, private-enterprise

WordNet sense 4 (favoring or practicing capitalism):

capitalist, capitalistic

WordNet sense 5 (showing a fighting disposition):

militant

WordNet sense 6 (having or showing determination and energetic pursuit of your ends):

aggressive