Rock-solid synonyms | phrases

Phrases with similar meaning for Rock-solid

• based on hard data

  based on sound reasoning
• based on hard facts

  based on sound reasoning
• well-founded
• rock solid
• always there
• on the level
• on up and up
• to be trusted
• tried-and-true
• true-blue
• up-front
• come-through
• counted on
• dyed-in-the-wool
• never-failing
• rock-hard
• brick wall
• in the flesh
• in human form
• made flesh
• well-grounded
• sworn to
• cast-iron