Modifiers matching peptide:

• active,
• minor,
• synthetic,
• analgesic,
• endogenous,
• proinflammatory,
• psychoactive,
• antigenic,
• interesting,
• addictive,
• anticancer,
• foreign,
• natural,

Simple categories matching addictive:

• substance,
• drug,
• pastry,
• state,
• vice,
• stage,
• medication,
• taste,
• behavior,
• compound,
• stimulant,
• behaviour,
• narcotic,
• chemical,
• poison,
• product,
• condition,
• alkaloid,
• food,
• painkiller,
• activity,
• agent,
• property,
• material,
• emotion,
• benzodiazepine,
• process,
• disorder,
• barbiturate,
• foodstuff,
• sedative,
• opiate,
• form,
• analgesic,
• peptide,
• pattern,
• amphetamine,
• medicine,