Modifiers matching obstruction:

• physical,
• natural,
• local,
• permanent,
• metal,
• minor,
• under,
• short,
• impenetrable,
• solid,
• linear,
• hidden,
• vertical,
• electrical,
• temporary,
• spatial,
• nearby,
• visual,
• removable,
• rigid,
• artificial,
• immovable,
• overhead,
• major,
• nasal,
• outdoor,
• mechanical,
• past,
• low,
• topical,
• lighted,
• opaque,
• layer,
• current,
• horizontal,
• over,
• up,
• elongated,
• small,
• hazardous,
• environmental,
• level,
• larger,
• terrestrial,
• multiple,
• insurmountable,
• tall,
• upright,
• significant,
• hard,
• dense,
• structural,
• cooler,
• unusual,
• smaller,
• typical,
• geographic,
• external,
• common,
• discrete,
• relevant,
• lateral,
• subsurface,
• surrounding,
• raised,
• movable,
• taller,
• additional,
• virtual,
• bigger,
• isolated,
• underground,
• adjacent,
• featureless,
• internal,
• large,
• hydraulic,
• fixed,
• simple,
• visible,
• irregular,
• indoor,
• underwater,
• urethral,
• clear,

Simple categories matching immovable:

• property,
• machine,
• object,
• fixture,
• obstruction,
• artifact,
• vehicle,
• assets,
• artefact,
• structure,
• article,
• equipment,
• facility,
• surface,
• barrier,
• impediment,
• feature,
• point,
• part,
• form,
• item,
• thing,
• mass,