1. (n.) The endeavor to equal or to excel another in qualities or actions; an assiduous striving to equal or excel another; rivalry.

2. (n.) Jealous rivalry; envy; envious contention.

antagonism antipathy bad blood championship clashing collision competitor concours conflict contention contest contrariety contrariness corrival cross-purposes cutthroat competition disaccord dissension emulation enmity event fractiousness friction game gamesmanship hostility inimicalness jockeying lifemanship match meet meeting negativeness noncooperation obstinacy one-upmanship oppugnancy perverseness recalcitrance refractoriness rencontre repugnance rivalry strife striving struggle tournament tug-of-war uncooperativeness vying warfare