Modifiers matching propellant:

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

Simple categories matching hazardous:

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