Modifiers matching peptide:

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

Simple categories matching anticancer:

• therapy,
• peptide,
• treatment,
• compound,
• agent,
• modality,
• drug,