Modifiers matching waterway:

• over,
• established,
• common,
• shallow,
• natural,
• moving,
• adjacent,
• narrow,
• continuous,
• inland,
• nearby,
• local,
• urban,
• artificial,
• clean,
• major,
• small,
• rural,
• smaller,
• open,
• larger,
• recreational,
• restricted,
• unobstructed,
• active,
• navigable,

Simple categories matching artificial:

• habitat,
• light,
• structure,
• sound,
• material,
• container,
• institution,
• joint,
• perch,
• surface,
• aid,
• enclosure,
• situation,
• fiber,
• decoration,
• object,
• housing,
• body,
• conduit,
• cavity,
• highway,
• medium,
• fibre,
• feature,
• equipment,
• unit,
• image,
• polyamide,
• system,
• sweetener,
• illuminant,
• method,
• works,
• sense,
• progestin,
• silk,
• practice,
• environment,
• polymer,
• thermostat,
• limb,
• cue,
• reef,
• activity,
• devices,
• weight,
• fastener,
• product,
• satellite,
• fabric,
• language,
• process,
• feed,
• conveyance,
• vesicle,
• extremity,
• shade,
• appliance,
• measure,
• lure,
• drain,
• sapphire,
• cosmetic,
• jewel,
• shelter,
• grouping,
• flavoring,
• instrument,
• gem,
• obstacle,
• space,
• person,
• effort,
• grass,
• distortion,
• emulsion,
• disturbance,
• selection,
• bait,
• hormone,
• humanoid,
• plant,
• wealth,
• binder,
• ingredient,
• flaw,
• leather,
• defect,
• agent,
• thing,
• tissue,
• flower,
• piece,
• marking,
• creature,
• contraceptive,
• hazard,
• receptacle,
• feeding,
• barrier,
• dielectric,
• nail,
• ground,
• preparation,
• item,
• part,
• character,
• creation,
• production,
• wetland,
• artefact,
• relic,
• flavor,
• blockage,
• lighting,
• facility,
• control,
• additive,
• organs,
• cloning,
• drainage,
• aggregate,
• stimulant,
• odour,
• floor,
• pathogen,
• channel,
• stone,
• sign,
• substance,
• illumination,
• obstruction,
• muscle,
• enterprise,
• actuation,
• noise,
• constraint,
• harbor,
• tube,
• noisemaker,
• cause,
• area,
• article,
• chemical,
• textile,
• network,
• scent,
• bone,
• casing,
• waterway,
• abrasive,
• construction,
• means,
• flavouring,
• layer,
• watercourse,
• clothing,
• stimulus,
• sediment,
• oil,
• organ,
• resin,
• arm,
• compound,
• support,
• preservative,
• phenomenon,
• boundary,
• panel,
• glass,
• tree,
• polyester,
• fluid,
• fuel,
• intoxicant,
• rod,
• food,
• order,
• rock,
• domain,
• vegetation,
• perturbation,
• siding,
• attribute,
• jewellery,
• condition,
• intelligence,
• crystal,
• forest,
• particle,
• lake,
• goal,
• care,
• gas,
• action,
• machine,
• filament,
• event,
• component,
• entity,
• location,
• activator,
• source,
• substrate,
• land,
• treatment,
• graphite,
• defence,
• fragrance,
• flavour,
• device,
• deposit,
• gemstone,
• fill,
• lubricant,
• marker,
• sensor,
• pond,