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Noun: tuff  túf
  1. Hard volcanic rock composed of compacted volcanic ash
    - tufa

Sounds like: tough

Derived forms: tuffs

Type of: volcanic rock

Encyclopedia: Tuff

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Tucson
Tudor
Tudor arch
Tudor architecture
tudung
Tue.
Tues
Tuesday
tufa
tufaceous
tuff
tuffet
tuft
tufted
tufted centaury
tufted gentian
tufted pansy
tufted puffin
tufted titmouse
tufted vetch
tufty