Synonyms of the word

opposing

• adj. That opposes or oppose; on the opposite side.
• v. present participle of oppose.

anti

• adj. (chemistry) That has a torsion angle between 90° and 180°.
• n. A person opposed to a concept or principle.
• prep. (rare) Alternative form of anti-.

hostile

• adj. Belonging or appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence,…
• adj. Aggressive, antagonistic.
• adj. Of a hostile takeover.
• n. (chiefly in the plural) An enemy.

opponent

• n. An individual or group who is a rival of another.
• n. One who attempts to stop the progression of.
• n. One who objects to.
• n. In team sports, a player of an opposite team.
• adj. Situated in front; opposite; hence, opposing; adverse; antagonistic.

opposed

• adj. Acting in opposition; opposing.
• adj. Being, of having an opponent; not unopposed.
• v. simple past tense and past participle of oppose.