Category Nuances for tritium:

• hazardous,
• heavy,
• unconventional,
• radioactive,
• elemental,
• small,
• necessary,
• number,
• light,
• sensitive,
• related,
• exotic,
• inert,
• chemical,
• common,
• fissile,
• fragile,

Simple Categories for tritium:

• material,
• constituent,
• substance,
• solute,
• component,
• atom,
• element,
• hydrogen,
• gas,