Modifiers matching obstruction:

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

Simple categories matching level:

• degree,
• predator,
• surface,
• metal,
• group,
• content,
• operations,
• manager,
• variable,
• person,
• instruction,
• unit,
• attack,
• class,
• activity,
• offense,
• competition,
• instrument,
• skill,
• cause,
• ground,
• behavior,
• animal,
• thing,
• switch,
• equipment,
• training,
• programming,
• feeder,
• executive,
• employee,
• module,
• object,
• layer,
• communication,
• product,
• form,
• electrician,
• transition,
• abstraction,
• atom,
• authority,
• control,
• offence,
• location,
• road,
• school,
• mammal,
• feature,
• information,
• relative,
• judge,
• ability,
• property,
• grouping,
• function,
• matter,
• invertebrate,
• leaders,
• action,
• element,
• generalization,
• commander,
• relationship,
• shape,
• infection,
• calculation,
• component,
• user,
• attitude,
• message,
• movement,
• specialist,
• development,
• document,
• officer,
• quality,
• controller,
• host,
• position,
• measure,
• domain,
• career,
• cognition,
• authorities,
• subject,
• responsibility,
• bird,
• constituent,
• actor,
• vocabulary,
• expert,
• administrator,
• mandate,
• service,
• official,
• lighting,
• device,
• subscription,
• food,
• processing,
• subdivision,
• carnivore,
• headquarters,
• representation,
• department,
• resource,
• study,
• language,
• details,
• organisation,
• contaminant,
• initiative,
• page,
• indicator,
• protocol,
• weapon,
• point,
• publication,
• command,
• task,
• key,
• award,
• work,
• system,
• defense,
• characteristic,
• set,
• entity,
• bond,
• individual,
• reform,
• hierarchy,
• condition,
• sport,
• knowledge,
• goal,
• assembly,
• attribute,
• design,
• facility,
• info,
• substrate,
• structure,
• ingredient,
• education,
• occupation,
• writing,
• personnel,
• floor,
• intervention,
• room,
• area,
• people,
• microorganism,
• vertebrate,
• block,
• fish,
• quantity,
• image,
• means,
• base,
• template,
• scholarship,
• artifact,
• material,
• agent,
• mood,
• institution,
• noise,
• measurement,
• job,
• computer,
• phenomenon,
• barrier,
• body,
• aggregate,
• crime,
• prey,
• report,
• mission,
• capacity,
• tone,
• game,
• text,
• concept,
• editor,
• hardware,
• staff,
• explosive,
• package,
• software,
• force,
• program,
• alarm,
• carrier,
• punch,
• agency,
• assessment,
• waste,
• data,
• source,
• professional,
• trait,
• performance,
• issue,
• meeting,
• works,
• plan,
• list,
• rule,
• perception,
• organization,
• artefact,
• substance,
• sensor,
• foundation,
• virtue,
• outcome,
• creature,
• factor,
• employment,
• obstruction,
• supply,
• mode,
• journal,
• usage,
• peer,
• culture,
• taxon,
• policy,
• roadway,
• trap,
• change,
• course,
• process,
• phase,
• event,
• space,
• aim,
• committee,
• behaviour,
• dependency,
• interaction,
• plant,
• organism,
• signal,
• flight,
• support,
• worker,