Category Nuances for null:

• deadly,
• illegal,
• detrimental,
• ii,
• addictive,
• central,
• profitable,
• powerful,
• hard,
• outside,
• dark,
• illicit,
• analgesic,
• strong,
• dangerous,
• narcotic,
• important,
• primary,
• recreational,
• hardcore,
• medicinal,
• psychoactive,
• diverse,
• nonprescription,
• particular,
• contraband,
• controlled,
• individual,
• valuable,
• established,
• harder,
• disposable,
• common,
• semisynthetic,
• powdered,
• old,
• new,
• damaging,
• western,
• soluble,
• useful,
• intoxicating,
• harsh,
• synthetic,
• destructive,
• exotic,
• noxious,
• single,
• debilitating,
• physical,
• injectable,
• basic,
• external,
• controversial,
• psychotropic,
• expensive,
• terrible,
• alternative,
• heavy,
• hydrophobic,
• bad,
• popular,
• major,
• exogenous,
• prescribed,
• natural,
• manufactured,
• modern,
• iv,
• forbidden,
• conventional,
• familiar,
• pharmacological,
• depressant,
• hazardous,
• potential,
• traditional,
• organic,
• toxic,
• pure,
• harmful,
• lethal,
• devastating,
• nervous,
• soft,
• regulated,
• novel,
• pharmaceutical,
• additional,
• hallucinogenic,
• legal,
• licit,
• social,
• potent,
• lipophilic,
• real,
• serious,
• heavier,

Simple Categories for null:

• drug,
• agent,
• solute,
• substance,
• medication,
• narcotic,
• intoxicant,
• medicine,
• system,
• opiate,
• thing,
• poison,
• agonist,