Modifiers matching obstruction:

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

Simple categories matching vertical:

• market,
• topic,
• measure,
• dimension,
• surface,
• marker,
• pillar,
• support,
• object,
• transport,
• mall,
• space,
• furnishing,
• structure,
• level,
• distribution,
• drainage,
• engine,
• device,
• industry,
• subject,
• movement,
• position,
• part,
• process,
• line,
• picture,
• biped,
• area,
• terms,
• edge,
• feature,
• obstruction,
• result,
• sector,
• member,
• function,
• solution,
• steps,
• load,
• domain,
• field,
• unit,
• plane,
• item,
• distance,
• application,
• medium,
• thing,
• margin,
• institution,
• break,
• control,
• ground,
• panel,
• sign,
• passageway,
• property,
• access,
• hierarchy,
• standard,
• relationship,
• activity,
• restraint,
• information,
• column,
• extent,
• enterprise,
• search,
• length,
• direction,
• boundary,
• format,
• content,
• gradient,
• system,
• substrate,
• installation,
• force,
• construction,
• artefact,
• improvement,
• obstacle,
• representation,
• shape,
• door,
• attribute,
• articulation,
• opening,
• website,
• organization,
• interval,
• business,
• strand,
• form,
• pole,
• arena,
• siding,
• barrier,
• artifact,
• pipe,
• shaft,
• passage,
• wall,
• loading,
• service,
• formation,
• drain,
• image,
• post,
• excavation,
• route,
• cylinder,
• datum,
• infrastructure,
• section,
• component,
• upright,