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

See also: incombustible, noncombustible

• astrakhan
• astral
• astrantia
• Astrantia major
• astraphobia
• astration
• astray
• Astreus
• Astreus hygrometricus
• Astreus pteridis
• astride
• astringe
• astringence
• astringency
• astringent
• astringent drug
• astringently
• astro-
• astrobiology
• astrocyte
• astrocytic
• astrodome
• astrodynamics
• astrogate
• astrogator