1. Difficult to burn
   - fire-retardant, fire-resistant, fire-resisting

See also: incombustible, noncombustible

• zeta
• Zetland
• zettabit
• zettabyte
• zeugma
• Zeus
• Zeus faber
• Zhou
• Zhou dynasty
• Zhou En-lai
• Zhu Jiang
• Zhuang
• Zhukov
• ZiB
• Zibit
• zidovudine
• Ziegfeld
• Ziegfeld Follies
• Ziegler
• zig
• zigadene
• Zigadenus
• Zigadenus elegans
• Zigadenus glaucus
• Zigadenus nuttalli