Modifiers matching primary:

• luminous,
• stellar,

Simple categories matching stellar:

• medium,
• quantity,
• structure,
• object,
• system,
• activity,
• primary,
• component,
• body,
• mass,
• process,
• interaction,
• event,
• property,
• wind,
• evolution,
• cluster,
• motion,
• phenomenon,
• material,
• agglomeration,