opponent, enemy, adversary, foe

be opposed to

enmity, hostility

stance of opposition,in contravention, contrary

oppositions

oppose, dissent, go against, resist

to oppose, to contravene

opposite, opponent

contrary wind, foul wind, wind blowing in the opposite direction

opposition, opposition party

Pros and cons, arguments for and against.

opposite side, an opposition

opposite genders

briskness, fierceness of opposite wind