Modifiers matching extra:

• little,
• unwanted,
• new,
• nice,
• insignificant,
• handy,
• wonderful,
• special,
• standard,
• taxing,
• usual,
• exterior,
• essential,
• necessary,
• thoughtful,
• typical,
• valuable,
• offer,
• strange,
• unique,
• costly,
• clean,
• exclusive,
• free,
• useful,
• personal,
• fancy,
• beautiful,
• everyday,
• over,
• traditional,
• delicate,
• cool,
• optional,
• ancillary,
• rare,
• expensive,
• interesting,
• sophisticated,
• convenient,
• common,
• fixed,
• colorful,
• desirable,
• miscellaneous,
• complimentary,
• small,
• available,
• online,
• up,
• good,
• external,
• technical,
• exciting,
• luxurious,
• popular,
• exotic,
• hidden,
• heavy,
• fattening,
• internal,
• modern,
• significant,
• cosmetic,
• removable,
• decorative,
• important,
• helpful,
• additional,
• light,
• possible,
• interior,
• basic,
• out,
• related,
• editorial,
• funny,
• premium,
• wild,
• bulky,
• ornamental,
• veterinary,
• nonstandard,

Simple categories matching clean:

• surface,
• textile,
• hydrocarbon,
• item,
• appliance,
• substance,
• container,
• jewel,
• supply,
• fluid,
• area,
• clothing,
• hay,
• uniform,
• material,
• lettuce,
• gemstone,
• article,
• paper,
• vegetable,
• business,
• metal,
• waterway,
• receptacle,
• fabric,
• medium,
• machine,
• gem,
• ground,
• soil,
• food,
• runoff,
• property,
• object,
• equipment,
• matter,
• instrument,
• audio,
• amp,
• cloth,
• brush,
• environment,
• liquid,
• garment,
• electricity,
• feature,
• effort,
• work,
• fuel,
• piece,
• gas,
• air,
• corpus,
• apparel,
• dressing,
• facility,
• space,
• ingredient,
• fiber,
• bedding,
• sample,
• stain,
• laundry,
• loan,
• sand,
• debris,
• solid,
• club,
• service,
• grain,
• gutter,
• building,
• tubing,
• water,
• design,
• contaminant,
• cylinder,
• sediment,
• floor,
• mixer,
• screen,
• wastewater,
• vessel,
• pollutant,
• atmosphere,
• fish,
• technology,
• board,
• bird,
• tool,
• energy,
• green,
• part,
• salt,
• production,
• system,
• aggregate,
• solvent,
• industry,
• inside,
• semiconductor,
• jar,
• fun,
• deposit,
• animal,
• aroma,
• activity,
• meat,
• residue,
• bones,
• location,
• lake,
• stone,
• source,
• artifact,
• plate,
• utensil,
• particle,
• territory,
• waste,
• comestible,
• product,
• sport,
• furniture,
• fixture,
• veggie,
• procedure,
• bottle,
• linen,
• extra,
• component,
• organs,
• structure,
• substrate,
• seed,
• conduit,
• room,
• place,
• string,
• drape,
• line,
• device,
• thing,
• abrasive,