Modifiers matching shelter:

• major,
• inside,
• portable,
• temporary,
• internal,
• sturdy,
• outside,
• underground,
• natural,
• animal,
• larger,
• recreational,
• warm,
• makeshift,
• safe,
• dark,
• private,
• covered,
• alternative,
• nearby,
• up,
• suitable,
• homeless,
• protective,
• indoor,
• outdoor,
• communal,
• humid,
• small,
• erect,
• fixed,
• under,
• separate,
• artificial,
• traditional,
• permanent,
• smaller,
• irregular,
• informal,
• basic,
• damp,
• open,
• mobile,

Simple categories matching indoor:

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