tuff /tuf, tŭf/

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

tuffāˈceous adjective

• humaneness
• humanenesses
• human engineering
• humaner
• humane societies
• humane society
• humanest
• human guinea pig
• human immunodeficiency virus
• human interest
• humanisation
• humanisations
• humanise
• humanised
• humanises
• humanising
• humanism
• humanisms
• humanist
• humanistic
• humanists
• humanitarian
• humanitarianism
• humanitarians
• humanities