tufa /tooˈfə, tūˈfə/

1. Calc-sinter (often calcareous tufa)
2. Tuff or other porous rock (obsolete)

• railing
• railingly
• railings
• railleries
• raillery
• railless
• raillies
• railly
• railman
• railmen
• rail-motor
• rail-motors
• railroad
• railroad car
• railroad cars
• railroaded
• railroader
• railroaders
• railroading
• railroads
• rails
• rail-splitter
• rail-splitters
• railway
• railway carriage