Modifiers matching instability:

• political,
• persistent,
• secondary,
• dynamic,
• macroscopic,
• dynamical,
• internal,

Simple categories matching dynamical:

• event,
• system,
• entity,
• feature,
• process,
• model,
• phenomenon,
• structure,
• quantity,
• perturbation,
• property,
• force,
• characteristic,
• behavior,
• cause,
• information,
• energy,
• motion,
• measure,
• exponent,
• terms,
• state,
• mechanism,
• evolution,
• parameter,
• behaviour,
• variable,
• instability,