Modifiers matching boundary:

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

Simple categories matching hierarchical:

• system,
• grammar,
• structure,
• nature,
• position,
• relation,
• power,
• information,
• institution,
• data,
• organization,
• means,
• concept,
• feature,
• database,
• relationship,
• directory,
• church,
• dimension,
• job,
• content,
• control,
• thing,
• tree,
• arrangement,
• subculture,
• object,
• organisation,
• unit,
• view,
• entity,
• group,
• model,
• list,
• boundary,
• taxon,
• category,
• level,
• school,
• attribute,
• symmetry,
• network,
• difference,
• paradigm,
• characteristic,
• opposition,
• technique,
• quality,
• association,
• religion,
• display,