Modifiers matching stimulant:

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

Simple categories matching exogenous:

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