Category Nuances for nuclear_waste:

• environmental,
• deadly,
• threatening,
• hazardous,
• nuclear,
• difficult,
• underground,
• radioactive,
• complex,
• challenging,
• remote,

Simple Categories for nuclear_waste:

• contaminant,
• space,
• activity,
• chemical,
• waste,
• material,
• substance,
• object,
• operation,
• mixture,