Rock-hard

adj

adj ·Rare ·Advanced level

Definitions

Adjective

1
Alternative spelling of rock hard. alt-of, alternative

Synonyms

rock solid rock solid stony

Example

"Titan is so cold that water exists as rock-hard ice, and oily methane falls from the sky and trickles into the seas."

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.