Modifiers matching athletics:

• recreational,
• organized,
• favourite,
• vigorous,
• overhead,
• light,
• heavy,
• intramural,
• extracurricular,
• individual,
• intercollegiate,
• professional,
• seasonal,
• indoor,
• interscholastic,
• aggressive,
• strenuous,
• competitive,

Simple categories matching indoor:

• quality,
• pesticide,
• sport,
• animal,
• activity,
• game,
• housework,
• theatre,
• lamp,
• area,
• shelter,
• play,
• facility,
• display,
• renovation,
• exposure,
• celebration,
• fitting,
• lodging,
• space,
• pool,
• fun,
• surface,
• atmosphere,
• source,
• event,
• product,
• room,
• work,
• gathering,
• location,
• function,
• drain,
• pollutant,
• allergy,
• structure,
• performance,
• support,
• control,
• sound,
• device,
• thing,
• loudspeaker,
• housing,
• gas,
• dog,
• exhibit,
• item,
• site,
• furnishing,
• unit,
• allergen,
• clientele,
• photograph,
• pest,
• centre,
• institution,
• venue,
• antigen,
• organism,
• course,
• devices,
• vehicle,
• shot,
• recreation,
• action,
• particle,
• firework,
• arena,
• scene,
• problem,
• noise,
• ornament,
• setting,
• project,
• antenna,
• entertainment,
• usage,
• flower,
• use,
• particulate,
• partition,
• assembly,
• toy,
• climate,
• diversion,
• exercise,
• air,
• treatment,
• material,
• lighting,
• fuel,
• furniture,
• meeting,
• restaurant,
• establishment,
• substance,
• houseplant,
• enclosure,
• passage,
• wall,
• insect,
• installation,
• floor,
• medium,
• food,
• container,
• set,
• stuff,
• stadium,
• covering,
• plant,
• condition,
• light,
• communication,
• party,
• art,
• fountain,
• fixture,
• obstruction,
• task,
• attraction,
• appliance,
• creature,
• application,
• object,
• decoration,
• environment,
• equipment,
• contaminant,
• machine,
• bird,
• coating,
• graphics,
• tile,
• place,
• building,
• chemical,
• substrate,
• job,
• athletics,
• component,
• pet,