1. Hard as granite
   - granitic, granitelike, stony

See also: hard

• tetrabasic acid
• tetrabromo-phenolsulfonephthalein
• tetracaine
• tetrachlorethylene
• tetrachloride
• tetrachloroethylene
• tetrachloromethane
• tetrachord
• tetrachoric correlation
• tetrachoric correlation coefficient
• Tetraclinis
• Tetraclinis articulata
• tetracycline
• tetrad
• tetradecanoic acid
• tetraethyl lead
• tetrafluoroethylene
• tetragon
• tetragonal
• Tetragonia
• Tetragonia expansa
• Tetragonia tetragonioides
• Tetragoniaceae
• Tetragonurus
• tetragram