Modifiers matching hallucinogen:

• popular,
• potent,
• common,
• new,
• traditional,
• strong,
• legal,
• related,
• natural,
• illegal,
• synthetic,

Simple categories matching synthetic:

• material,
• gum,
• bristle,
• layer,
• fabric,
• polymer,
• pesticide,
• food,
• filler,
• drug,
• fibre,
• component,
• plastic,
• antimalarial,
• scale,
• glucocorticoid,
• substrate,
• contaminant,
• abrasive,
• gene,
• equipment,
• chemical,
• gem,
• herbicide,
• papers,
• particle,
• peptide,
• cloth,
• gemstone,
• antagonist,
• frame,
• thing,
• steroid,
• stone,
• opal,
• fleece,
• nsaid,
• surface,
• item,
• cure,
• phenomenon,
• clothing,
• fluid,
• intermediate,
• system,
• estrogen,
• part,
• gas,
• cortisol,
• hallucinogen,
• amphetamine,
• flavoring,
• oestrogen,
• graphite,
• anticoagulant,
• leather,
• resin,
• substance,
• diamond,
• sweetener,
• silicate,
• agonist,
• pharmaceutical,
• progesterone,
• activity,
• paint,
• object,
• oxide,
• topaz,
• work,
• antimicrobial,
• precursor,
• grease,
• fiber,
• antibiotic,
• painkiller,
• agent,
• document,
• narcotic,
• hydrocarbon,
• fertilizer,
• entity,
• membrane,
• penicillin,
• vector,
• enzyme,
• ester,
• androgen,
• undergarment,
• corticosteroid,
• filament,
• nutrient,
• crystal,
• antidepressant,
• siding,
• ingredient,
• wax,
• unit,
• lubricant,
• ligand,
• progestin,
• sedative,
• starch,
• equity,
• medication,
• insecticide,
• foam,
• structure,
• medium,
• mineral,
• pigment,
• fertiliser,
• textile,
• flooring,
• stimulant,
• lacquer,
• macromolecule,
• fumigant,
• carrier,
• insulator,
• solvent,
• coating,
• latex,
• condition,
• pianoforte,
• instrument,
• rope,
• clothes,
• medicine,
• polyamide,
• compound,
• carbon,
• adhesive,
• sound,
• elastomer,
• solid,
• product,
• nature,
• cortisone,
• micronutrient,
• reaction,
• input,
• oil,
• molecule,
• glue,
• fuel,
• hormone,
• cosmetic,
• process,
• anesthetic,
• yarn,
• source,
• copolymer,
• progestogen,
• opiate,
• glove,
• aggregate,
• preservative,
• event,
• wig,