Modifiers matching obstruction:

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

Simple categories matching hidden:

• instrument,
• population,
• condition,
• object,
• expenditure,
• part,
• danger,
• area,
• weapon,
• charge,
• quantity,
• obstruction,
• pitfall,
• cost,
• disease,
• treasure,
• impairment,
• message,
• force,
• stuff,
• reinforcement,
• metal,
• dealer,
• thing,
• folder,
• assets,
• item,
• content,
• activity,
• location,
• material,
• pathology,
• fee,
• information,
• feature,
• image,
• disability,
• unit,
• place,
• earth,
• gem,
• expense,
• charm,
• process,
• riches,
• space,
• surface,
• substance,
• property,
• attribute,
• corner,
• cause,
• data,
• structure,
• organs,
• resource,
• extra,
• problem,
• system,
• identification,
• group,
• illness,
• tax,
• words,
• creature,
• character,
• fastener,
• line,
• wall,