The Oxford Thesaurus An A-Z Dictionary of Synonyms INTRO ...

oppose v. 1 resist, counter, object (to), defy, take a stand against,
withstand, resist, combat, contest, attack, counter-attack,
fight, grapple with, contend with or against: If it comes to
that, we must oppose force with force. 2 check, bar, obstruct,
block, hinder, impede, stop, slow, curb, restrain, inhibit,
interfere with, restrict, prevent, obviate, preclude, thwart,
foil, frustrate: Labour seeks to oppose the privatization of
industry. 3 match, offset, counterbalance, contrast, pit or set
against, play off (against), set off: What can they call upon
to oppose the power of the Devil?
opposed adj. Often, opposed to. against, in opposition (to), opposing,
in conflict (with), antipathetic, conflicting, contrary (to), at
variance (with), antithetical (to), hostile (to), inimical (to),
opposite (to), contrasting: Harvey is among those opposed to
abortion. All those who are opposed to the motion raise your
hands.
opposing adj. opposite, conflicting, contrary, antithetical,
antagonistic, antipathetic, hostile, inimical, contrasting,
rival, contradictory, incompatible, irreconcilable, dissident,
discrepant: Those with opposing views will be heard from later.
opposite adj. 1 facing, vis-…-vis, en face: The sniper was on the roof
of the building opposite. 2 opposing, conflicting, contrary,
contrasting, contradictory, antithetical, differing, different,
divergent, diverse, antagonistic, inconsistent, irreconcilable:
William and his wife hold diametrically opposite political
views.
--n. 3 reverse, converse, contrary, antithesis: Whatever you
tell teenagers to do, their first reaction is to do the
opposite.
opposition
n. 1 hostility, antagonism, unfriendliness, resistance,
counteraction, disapproval, objection, conflict, defiance,
contrast, antipathy, adversity, Colloq flak: There is strong
opposition to plans for an amusement arcade. 2 competition,
opponent, adversary, competitor, antagonist, enemy, foe, rival,
other side: We must overcome the opposition in order to win. 3
in opposition. competing, competitive, antagonistic, hostile,
conflicting, in conflict, antithetic(al), opposed, at daggers