rock-solid
Absolutely beyond doubt
Rock-solid means completely firm, stable, or reliable.
A rock-solid foundation won't shift or crack.
Rock-solid evidence is unassailable.
A rock-solid alibi leaves no room for doubt.
The hyphenated form functions as an adjective; without the hyphen, rock solid typically follows the noun: The marriage was rock solid.
Worthy of trust
- unwaveringSteady and unchanging
- trustworthyWorthy of confidence
- steadfastFirmly loyal, unshakeable
- foolproofIncapable of failure
bulletproof · ironclad · unshakeable · consistent · stable · proven · guaranteed · unfailing
Firm in allegiance
- committedFirmly pledged or bound
- devotedLoyally and lovingly attached
- faithfulConsistently loyal and true
- unshakeableImpossible to disturb
steadfast · trusting · bonded · enduring · lasting · strong · tight-knit · inseparable
Igneous rock, quartz-rich
- concreteSolid building mixture
- bedrockSolid stone underground
- stoneSolid earth fragment
- marbleRecrystallized limestone rock
hardened · rigid · firm · dense · unyielding · impenetrable · reinforced · fortified
Secure and unchanging
- secureProtected from harm
- gilt-edgedOf superior quality
- blue-chipFinancially stable and reputable
- creditworthyFit for loans
solvent · liquid · backed · guaranteed · insured · diversified · balanced · conservative
Impossible to disprove
- airtightImpervious to atmosphere
- undeniableImpossible to contradict
- conclusiveEnding all debate
- incontrovertibleImpossible to deny
indisputable · watertight · bulletproof · unassailable · compelling · substantiated · verified · documented
dependable
Worthy of trust
- unwaveringSteady and unchanging
- trustworthyWorthy of confidence
- steadfastFirmly loyal, unshakeable
foolproof · bulletproof · ironclad · unshakeable · consistent · stable · proven · guaranteed · unfailing · secure
loyal
Firm in allegiance
- committedFirmly pledged or bound
- devotedLoyally and lovingly attached
- faithfulConsistently loyal and true
unshakeable · steadfast · trusting · bonded · enduring · lasting · strong · tight-knit · inseparable · supportive
granite
Igneous rock, quartz-rich
marble · hardened · rigid · firm · dense · unyielding · impenetrable · reinforced · fortified · immovable
stable
Secure and unchanging
- secureProtected from harm
- gilt-edgedOf superior quality
- blue-chipFinancially stable and reputable
creditworthy · solvent · liquid · backed · guaranteed · insured · diversified · balanced · conservative · safe
irrefutable
Impossible to disprove
- airtightImpervious to atmosphere
- undeniableImpossible to contradict
- conclusiveEnding all debate
incontrovertible · indisputable · watertight · bulletproof · unassailable · compelling · substantiated · verified · documented · corroborated
- certaintycertain, sure, uncertain, unsure, definite
- commitment levelscommitted, dedicated, devoted, loyal, faithful
- strength wordsstrong, powerful, mighty, potent, robust
- dependabilityreliable, dependable, trustworthy, trusted, steadfast
- composurecalm, calmness, composure, composed, poise
- steadinessstability, consistency, constancy, steadiness, steadfastness
rock-solidunreliable
Not consistently performing
undependable · untrustworthy · inconsistent · flaky · erratic
rock, solid, rocks, rocked, rocking, rocker, rocky, rockier, rockiest