Modifiers matching stimulant:

• powerful,
• regular,
• simple,
• soft,
• synthetic,
• addictive,
• sympathomimetic,
• mild,
• physical,
• recreational,
• psychoactive,
• destructive,
• strong,
• medical,
• illegal,
• exogenous,
• familiar,
• ventilatory,
• major,
• common,
• biological,
• harder,
• cardiovascular,
• unnatural,
• popular,
• psychomotor,
• traditional,
• pharmacological,
• herbal,
• legal,
• manufactured,
• toxic,
• harmful,
• dangerous,
• artificial,
• harsh,
• controlled,
• immune,
• unhealthy,
• illicit,
• natural,
• bitter,
• controversial,
• active,
• pharmaceutical,
• prescribed,
• serious,
• potent,
• inert,
• cardiac,
• chemical,
• sexual,
• pharmacologic,
• nervous,

Simple categories matching exogenous:

• precursor,
• substance,
• agent,
• acceptor,
• occurrence,
• component,
• compound,
• base,
• opiate,
• development,
• authority,
• event,
• protein,
• alteration,
• substrate,
• particle,
• polysaccharide,
• carcinogen,
• activator,
• sugar,
• dna,
• variable,
• material,
• antioxidant,
• disturbance,
• antigen,
• proteinase,
• amine,
• source,
• steroid,
• intoxicant,
• food,
• glucocorticoid,
• cause,
• sterol,
• metal,
• inducer,
• pathogen,
• shock,
• contaminant,
• factor,
• acid,
• corticosteroid,
• stimulant,
• phenomenon,
• estrogen,
• hexose,
• molecule,
• inhibitor,
• input,
• ligand,
• drug,
• system,
• process,
• macromolecule,
• protease,
• change,
• solute,
• toxin,
• amphetamine,
• carbohydrate,
• cytokine,
• phosphoprotein,
• retrovirus,
• demand,
• stimulus,
• poison,
• enzyme,
• hormone,
• force,
• toxicant,
• signal,
• buffer,
• control,
• chemical,
• asthma,
• cofactor,
• catecholamine,
• condition,
• opsonin,
• issue,