Modifiers matching boundary:

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

Simple categories matching crystalline:

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