Modifiers matching stimulation:

• sensory,
• sexual,
• outside,
• auditory,
• electrical,
• active,
• intense,
• intellectual,
• light,
• emotional,
• mental,
• antigenic,
• internal,
• chronic,
• regular,
• sympathetic,
• environmental,
• aversive,
• physical,
• mechanical,
• noxious,
• external,

Simple categories matching antigenic:

• protein,
• substance,
• substrate,
• peptide,
• component,
• receptor,
• polymer,
• compound,
• material,
• molecule,
• property,
• agent,
• constituent,
• stimulation,
• carrier,
• macromolecule,
• preparation,