Modifiers matching boundary:

• natural,
• moving,
• oceanic,
• jurisdictional,
• physical,
• hexagonal,
• hierarchical,
• spherical,
• geopolitical,
• solid,
• simple,
• outer,
• atmospheric,
• historical,
• clear,
• hard,
• horizontal,
• distinct,
• single,
• rigid,
• geographical,
• significant,
• political,
• complex,
• curved,
• real,
• administrative,
• artificial,
• cultural,
• syntactic,
• spatial,
• nonconducting,
• crystalline,
• irregular,
• convenient,
• critical,
• nearby,
• hydraulic,
• ecological,
• semitransparent,
• governing,
• vertical,
• static,
• fixed,
• front,
• legal,
• biological,
• smooth,
• internal,
• permanent,
• visual,
• logical,
• external,
• smaller,
• geological,
• sharp,
• structural,

Simple categories matching spatial:

• surface,
• entity,
• formation,
• object,
• domain,
• information,
• figure,
• database,
• property,
• input,
• query,
• vocabulary,
• attribute,
• factor,
• impairment,
• assembly,
• system,
• works,
• expert,
• notion,
• gradient,
• visualization,
• dithering,
• relationship,
• activity,
• dependence,
• representation,
• vision,
• component,
• imperfection,
• structure,
• area,
• unit,
• flow,
• resolution,
• extent,
• hierarchy,
• experience,
• arts,
• organization,
• knowledge,
• orientation,
• operations,
• relations,
• creativity,
• ability,
• item,
• measure,
• idea,
• content,
• motion,
• science,
• installation,
• reasoning,
• dimension,
• consideration,
• movement,
• marker,
• level,
• variable,
• function,
• region,
• model,
• planning,
• difference,
• transformation,
• average,
• reference,
• consistency,
• disturbance,
• concentration,
• process,
• constraint,
• choice,
• location,
• image,
• plan,
• association,
• measurement,
• behavior,
• event,
• obstruction,
• fabric,
• issue,
• community,
• relation,
• position,
• array,
• investigation,
• cognition,
• skill,
• group,
• data,
• angle,
• medium,
• condition,
• rule,
• layer,
• quality,
• filter,
• distribution,
• construction,
• phenomenon,
• quantity,
• action,
• abstraction,
• economy,
• part,
• layout,
• form,
• change,
• task,
• primitive,
• analysis,
• sector,
• characteristic,
• study,
• pattern,
• display,
• scale,
• curve,
• boundary,
• procedure,
• aggregate,
• practice,
• discipline,
• arrangement,
• variation,
• network,
• artifact,
• development,
• activation,
• aggregation,
• category,
• context,
• setting,
• column,
• partition,
• order,
• concept,
• math,
• analyst,
• product,
• design,
• container,
• enclosure,
• tool,
• interaction,
• feature,