Simple categories matching opposing:

• force,
• event,
• group,
• state,
• phenomenon,
• property,
• image,
• category,
• thing,
• characteristic,
• party,
• team,
• process,
• aspect,
• duality,

Members with property opposing:

• friction,
• stretchy_band,
• frictional_force,
• justice,
• light,
• brisk_wind,
• wind,
• summation,
• proliferation,
• sedimentation,
• gravity,
• head_wind,
• nationality,
• political_affiliation,
• centrifugal_force,
• river_current,
• dark_state,
• australian_council,
• softness,
• parity,
• steady_current,
• darkness,
• oecumenical_council,
• heat,
• terminal_differentiation,
• police,
• low_friction,
• dod,
• religion,
• organization,
• sunni,
• arrow,
• culture,
• retina_light,
• green,
• peace_movement,
• generosity,
• healthcare_insurer,
• plaintiff,
• good_news,
• viscous_drag,
• hardness,
• defendant,
• conformity,
• authority,
• shia,
• moral_majority,
• labor_organization,
• affirmation,
• cell_proliferation,
• city-council_member,
• producer,
• welfare,
• attractive_interaction,
• military_police,
• differentiation,
• gravitation,
• room,
• workplace_union,
• motion,
• closeness,
• order,
• originality,
• disparity,
• pm,
• christian_coalition,
• chaos,
• union,
• large_corporation,
• bow,
• stillness,
• freedom_desire,
• work,
• current,
• high-temperature_strength,
• crown,
• retraction,
• state_office,
• wind_resistance,
• regional_grouping,
• labour_opposition,
• infection,
• various_government,
• blue,
• extension,
• apoptosis,
• telomere_polymerization,
• relaxation,
• perceptual_inhibition,
• protective_order,
• neighborhood_association,
• nature,