Definitions from Wiktionary (hard as a rock)
▸ adjective: (simile) Very hard (tough, inflexible); rock hard.
▸ Words similar to hard as a rock
▸ Usage examples for hard as a rock
▸ Idioms related to hard as a rock
▸ Wikipedia articles (New!)
▸ Popular nouns described by hard as a rock
▸ Words that often appear near hard as a rock
▸ Rhymes of hard as a rock
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▸ adjective: (simile) Very hard (tough, inflexible); rock hard.
Similar:
stony,
firm,
hardened,
unyielding,
inaction,
stoic,
stoical,
callosity,
callous,
casualness,
more...
▸ Words similar to hard as a rock
▸ Usage examples for hard as a rock
▸ Idioms related to hard as a rock
▸ Wikipedia articles (New!)
▸ Popular nouns described by hard as a rock
▸ Words that often appear near hard as a rock
▸ Rhymes of hard as a rock
▸ Invented words related to hard as a rock