Here's what rhymes with amateurism.

Consider these alternatives

professionalism / given commercialism / given egalitarianism / given gradualism / given collegiality / personality informality / personality gamesmanship / which rebelliousness / gregariousness obfuscation / education emotionalism / given easiness / uneasiness stultifying / dying sportsmanship / which illegality / personality nonpartisanship / which frivolity / quality illogic / logic politicization / information ingenuousness / strenuousness commercialisation / relation parochialism / given sartorial / territorial