tephra /tefˈrə/

Ash and debris ejected by a volcano

• re-formation
• reformation
• reformational
• reformationist
• reformationists
• reformations
• reformative
• reformatories
• reformatory
• reformats
• reformatted
• reformatting
• re-formed
• reformed
• Reformed Presbyterian
• Reformed Presbyterian Church
• reformer
• reformers
• Reform flask
• re-forming
• reforming
• reformism
• reformisms
• reformist
• reformists