Ant. Untimely, unseasonable, inopportune, infelicitous.
Opportunity. Occasion, convenience, occurrence, turn, opening.
Ant. Lapse, omission, inopportuneness, contre-temps.
Oppose. Combat, withstand, contradict, deny, gainsay, oppugn, contravene, check, obstruct.
Ant. Aid, abet, support, advance, expedite.
Opposite. Facing, contrary, repugnant, antagonistic, adverse, counter, contradictory, opposed.
Ant. Agreeing, coincident, harmonious, conformable, suiting, fitting, accordant.
Opposition. Restraint, defeat, resistance, hostility, obstacle, obstruction, animosity.
Ant. Sympathy, harmony, concord, alliance, congeniality.
Oppress. Impose, weigh down, burden, grind, persecute, overwhelm, crush, overpower, subdue.