Category Nuances for tritium:

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

Simple Categories for tritium:

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