Modifiers matching stimulant:

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

Simple categories matching harder:

• material,
• part,
• assets,
• sport,
• stone,
• feldspar,
• music,
• drug,
• stuff,
• ground,
• alloy,
• surface,
• metal,
• gemstone,
• formation,
• work,
• genre,
• filler,
• cheese,
• substrate,
• fabric,
• food,
• aggregate,
• particle,
• boot,
• thing,
• rock,
• sediment,
• glass,
• substance,
• tissue,
• mineral,
• ingredient,
• object,
• resin,
• layer,
• crystal,
• medium,
• structure,
• stimulant,
• narcotic,
• powder,
• deposit,
• pin,
• wood,
• currency,
• polymer,
• agent,
• abrasive,