adamant

adj 0.783

iron-hearted

adj 0.675

ironclad

adj 0.671

unyielding

adj 0.648

rock hard

adj 0.643

bulletproof

adj 0.642

indestructible

adj 0.641

unwavering

adj 0.636

unshakable

adj 0.632

hard-and-fast

adj 0.627

implacable

adj 0.625

resolute

adj 0.624

unbreakable

adj 0.622

impregnable

adj 0.622

steadfast

adj 0.622

hard as nails

adj 0.622

stonelike

adj 0.621

indomitable

adj 0.620

unflinching

adj 0.618

hard-set

adj 0.618

unrelenting

adj 0.612

inexorable

adj 0.611

invincible

adj 0.609

unswerving

adj 0.606

immovable

adj 0.604

steely

adj 0.603

flinty

adj 0.602

impervious

adj 0.601

rigid

adj 0.601

adamantinomatous

adj 0.600

apodictic

adj 0.599

unmovable

adj 0.597

staunch

adj 0.595

infrangible

adj 0.594

unassailable

adj 0.592

undeviating

adj 0.591

amaranthine

adj 0.588

bombproof

adj 0.588

dead set

adj 0.586

diamondlike

adj 0.586

stalwart

adj 0.584

indissoluble

adj 0.584

invulnerable

adj 0.583

rock-ribbed

adj 0.583

hardened

adj 0.582

absolute

adj 0.580

obdurate

adj 0.580

indurate

adj 0.580

undying

adj 0.579

intransigent

adj 0.577

relentless

adj 0.577

undefeatable

adj 0.576

diehard

adj 0.575

indubitable

adj 0.573

immutable

adj 0.572

set in stone

adj 0.572

onyx

adj 0.572

tenacious

adj 0.572

solid

adj 0.571

indefatigable

adj 0.571

unbending

adj 0.569

unalterable

adj 0.569

indurated

adj 0.565

stainless

adj 0.565

crystalline

adj 0.565

indefeasible

adj 0.563

stone cold

adj 0.562

stone deaf

adj 0.562

deathless

adj 0.562

obstinate

adj 0.562

pertinacious

adj 0.561

diamond

adj 0.560

hard

adj 0.559

inflexible

adj 0.559

undeterrable

adj 0.558

unerring

adj 0.557

stony

adj 0.557

uncompromising

adj 0.556

unbeatable

adj 0.556

immortal

adj 0.556

unfaltering

adj 0.555

unmoveable

adj 0.554

dauntless

adj 0.554

shatterproof

adj 0.553

sapphire

adj 0.552

nondeformable

adj 0.552

unstoppable

adj 0.551

unmoving

adj 0.551

impenetrable

adj 0.550

hardline

adj 0.550

determined

adj 0.550

hardy

adj 0.549

irrefutable

adj 0.548

unamendable

adj 0.547

sturdy

adj 0.545

unsusceptible

adj 0.544

everlasting

adj 0.543

unremitting

adj 0.543

incontrovertible

adj 0.543

stiff

adj 0.543