Modifiers matching atmosphere:

• inert,
• solar,
• dry,
• industrial,
• pure,
• clean,
• smoky,
• outdoor,
• qualified,
• dense,
• chemical,
• closed,
• heavy,
• severe,
• explosive,
• corrosive,
• single,
• surrounding,
• diffusing,
• dangerous,
• oxidative,
• rarefied,
• bad,
• inexpensive,
• isolated,
• outer,
• carbonaceous,
• indoor,
• neutral,
• gaseous,
• thick,
• extraneous,
• innocuous,
• planetary,
• hazardous,
• dynamic,
• rich,
• active,
• warm,
• working,
• vital,
• tropical,
• alkaline,
• harmful,
• controlled,
• flammable,
• cool,
• wet,
• saturated,
• protective,
• reactive,
• special,
• molecular,

Simple categories matching clean:

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