Modifiers matching particulate:

• secondary,
• airborne,
• inorganic,
• chemical,
• gross,
• toxic,
• micro,
• smaller,
• solid,
• coarse,
• suspended,
• diverse,
• fine,
• dustlike,
• nonmetallic,
• hazardous,
• charged,
• biological,
• abrasive,
• powdered,
• insoluble,
• inert,
• floating,
• foreign,
• small,
• indoor,
• crustal,
• supplemental,
• allergenic,
• larger,
• unhealthy,
• hard,
• large,
• soft,
• microscopic,
• crystalline,
• unwanted,
• atmospheric,
• available,
• ambient,
• size,
• pathogenic,
• metal,
• ceramic,
• sharp,
• conductive,
• organic,
• coated,
• natural,
• fibrous,
• heavy,
• liquid,
• dry,
• silver,
• tiny,

Simple categories matching micro:

• part,
• variable,
• sensor,
• organism,
• component,
• material,
• particle,
• devices,
• pin,
• machine,
• motor,
• particulate,
• process,
• structure,
• beam,
• ingredient,
• impurity,
• molecule,
• invertebrate,
• system,
• drive,
• herb,
• area,
• feature,
• mechanism,
• credit,
• activity,
• actuator,
• indication,
• nutrient,
• cavity,
• fauna,
• defect,