Modifiers matching shelter:

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

Simple categories matching inside:

• semitrailer,
• building,
• apparatus,
• structure,
• box,
• container,
• object,
• square,
• peripheral,
• control,
• shelter,
• weapon,
• surface,
• block,
• vehicle,
• conveyance,
• enterprise,
• panel,
• area,
• institution,
• body,
• bag,
• material,
• housing,
• machine,
• conduit,
• volume,
• part,
• location,
• equipment,
• furnishing,
• window,
• region,
• device,
• dwelling,
• facility,
• enclosure,
• setting,
• unit,
• fixture,
• establishment,
• cabinet,
• product,
• installation,
• wall,
• component,
• system,
• package,
• transport,
• architecture,
• stuff,
• vessel,
• home,
• bait,
• place,
• document,
• pastry,
• automobile,
• plant,
• space,
• medium,
• tissue,
• machinery,
• pipe,
• envelope,
• corner,
• transportation,
• chamber,