Modifiers matching opiate:

• external,
• addictive,
• potent,
• strong,
• analgesic,
• common,
• iv,
• illegal,
• prescribed,
• synthetic,
• natural,
• oral,
• heavy,
• lipophilic,
• individual,
• illicit,
• hydrophilic,
• semisynthetic,
• pharmaceutical,
• exogenous,
• narcotic,
• traditional,
• powerful,
• conventional,
• medical,
• medicinal,
• pure,

Simple categories matching analgesic:

• antipyretic,
• agent,
• drug,
• agonist,
• substance,
• medicine,
• compound,
• preparation,
• opiate,
• peptide,
• anaesthetic,
• chemical,
• medication,
• remedy,