tuff /tuf, tŭf/

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

tuffāˈceous adjective

• spring a mine
• spring balance
• spring balances
• spring beauties
• spring beauty
• spring beetle
• spring beetles
• spring-bladed
• springboard
• springboards
• springbok
• springboks
• spring box
• spring boxes
• springbuck
• springbucks
• spring-carriage
• spring-carriages
• spring-cart
• spring-carts
• spring chicken
• spring chickens
• spring-clean
• spring-cleaned
• spring-cleaner