tuff /tuf, tŭf/

1. A rock composed of fine volcanic fragments and dust
2. Tufa or other porous rock (obsolete)

tuffāˈceous adjective

• oint
• ointed
• ointing
• ointment
• ointments
• oints
• Oireachtas
• Oirish
• Oirishness
• OIRT
• oiticica
• oiticicas
• Ojibwa
• Ojibwas
• ojime
• ojimes
• OK
• oka
• Oka
• okapi
• okapis
• okas
• okay
• okayed
• okaying