Modifiers matching boundary:

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

Simple categories matching crystalline:

• carrier,
• fm,
• material,
• component,
• rock,
• nonmetal,
• order,
• mineral,
• aragonite,
• drug,
• defect,
• solid,
• substance,
• alloy,
• metal,
• elastomer,
• weakness,
• imperfection,
• boundary,
• tissue,
• apatite,
• system,
• fertilizer,
• gem,
• substrate,
• article,
• structure,
• polymer,
• semiconductor,
• powder,
• gemstone,
• salt,
• polysaccharide,
• state,
• form,
• character,
• property,
• ore,
• sugar,
• resin,
• sorbent,
• hair,
• fibre,
• thermoplastic,
• surface,
• insulator,
• particle,
• stone,
• particulate,
• layer,
• segment,
• sweetener,
• dielectric,
• oxide,
• shape,
• carbohydrate,
• fraction,
• deposit,
• marble,
• constituent,
• filler,
• medium,
• formation,
• residue,
• phase,
• matter,
• quartz,
• solute,
• si,
• element,
• object,
• hydrate,
• fiber,
• ingredient,
• aggregate,
• dislocation,
• carbon,
• parameter,
• lattice,
• compound,