Category Nuances for relations:

• model,
• abstract,
• mathematical,
• difficult,
• universal,
• new,
• structured,
• special,
• physical,
• flat,
• external,
• social,
• basic,
• formal,
• normal,
• factual,
• syntactic,
• graphic,
• symbolic,
• reusable,
• logical,
• vital,
• discrete,
• additional,
• general,
• fundamental,
• relevant,
• interactive,
• elementary,
• grammatical,
• primitive,
• personal,
• conceptual,
• semantic,
• delicate,
• federal,
• combinatorial,
• political,
• everyday,
• temporal,
• unfamiliar,
• important,
• foreign,
• common,
• cognitive,
• organizational,
• tangible,
• biological,
• complex,

Simple Categories for relations:

• object,
• process,
• concept,
• individual,
• attribute,
• idea,
• group,
• thing,
• entity,
• knowledge,
• component,
• subject,
• matter,
• notion,
• structure,
• theme,
• nature,
• unit,
• set,
• phenomenon,
• issue,
• information,
• power,
• topic,
• abstraction,
• activity,
• principle,