Modifiers matching propellant:

• liquid,
• conventional,
• dangerous,
• alternative,
• flammable,
• hazardous,
• damaging,
• modern,
• solid,
• available,
• common,
• toxic,
• cheap,
• chemical,
• liquefied,

Simple categories matching hazardous:

• crossing,
• pollution,
• substance,
• herbicide,
• material,
• fumes,
• pollutant,
• metal,
• task,
• creature,
• appliance,
• waste,
• chemical,
• preservative,
• contaminant,
• compound,
• location,
• pastime,
• attribute,
• element,
• agent,
• impurity,
• work,
• food,
• operations,
• behaviour,
• item,
• microorganism,
• obstacle,
• situation,
• enterprise,
• assignment,
• pattern,
• organism,
• activity,
• region,
• container,
• scene,
• system,
• residue,
• beverage,
• action,
• bacteria,
• insecticide,
• site,
• object,
• sector,
• anion,
• solvent,
• job,
• liquid,
• contamination,
• behavior,
• thing,
• disease,
• terrain,
• unit,
• salt,
• product,
• service,
• program,
• matter,
• installation,
• ground,
• environment,
• halide,
• nature,
• motion,
• gas,
• property,
• weather,
• condiment,
• accident,
• propellant,
• ingredient,
• hazard,
• drink,
• explosive,
• reactant,
• process,
• feature,
• animal,
• surface,
• tool,
• industry,
• duty,
• choice,
• hydrocarbon,
• pursuit,
• atmosphere,
• facility,
• component,
• aggregate,
• use,
• article,
• herb,
• pesticide,
• particle,
• occurrence,
• body,
• technology,
• oxidant,
• meat,
• recreation,
• constituent,
• nitrile,
• area,
• space,
• fuel,
• machinery,
• intermediate,
• employment,
• solid,
• part,
• room,
• elements,
• event,
• light,
• specimen,
• abrasive,
• fixture,
• pathogen,
• equipment,
• business,
• weapon,
• air,
• sport,
• machine,
• formulation,
• drinking,
• land,
• plant,
• incident,
• precipitation,
• place,
• particulate,
• condition,
• obstruction,
• metabolite,
• fiber,
• fluid,
• microbe,
• commodity,
• cargo,
• index,
• drug,
• circuit,
• point,
• occupation,
• phenomenon,
• characteristic,
• organophosphate,
• structure,