Modifiers matching stimulant:

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

Simple categories matching harsh:

• chemical,
• condition,
• activator,
• installation,
• cleaners,
• metal,
• weather,
• discipline,
• procedure,
• punishment,
• stimulant,
• elements,
• liquid,
• measure,
• reaction,
• agent,
• stuff,
• solvent,
• resin,
• fluid,
• soap,
• situation,
• sanction,
• detergent,
• practice,
• cleanser,
• drug,
• penalty,
• abrasive,
• ingredient,
• accident,
• consequence,
• constituent,
• disinfectant,
• substance,
• element,
• action,
• environment,
• hazard,
• material,
• pressure,
• compound,
• influence,
• antiseptic,
• contaminant,