Rock hard synonyms | adjectives

Synonyms for Rock hard as an Adjective

• tough

  hard like rock
• flinty

  hard like rock
• impenetrable

  hard like rock
• indestructible

  hard like rock
• unbreakable

  hard like rock
• adamantine
• rock-hard
• firm
• hard
• strong
• steely
• hard as nails
• determined
• rigid
• adamant
• heavy
• immovable
• steel
• thick
• unbending
• cruel
• dense
• ferric
• ferrous
• implacable
• indomitable
• inexorable
• insensible
• obdurate
• relentless
• robust
• stubborn
• unyielding