bulletproof

adj 0.851

ironclad

adj 0.693

shockproof

adj 0.674

heatproof

adj 0.659

shatterproof

adj 0.657

weatherproof

adj 0.651

unbreakable

adj 0.651

fireproof

adj 0.650

impregnable

adj 0.647

indestructible

adj 0.636

tamperproof

adj 0.634

rustproof

adj 0.633

rainproof

adj 0.631

foolproof

adj 0.627

unshakable

adj 0.618

unassailable

adj 0.618

sure-fire

adj 0.616

iron-hearted

adj 0.615

sturdy

adj 0.615

robust

adj 0.613

invulnerable

adj 0.612

steady as a rock

adj 0.605

armored

adj 0.601

explosion-proof

adj 0.600

windproof

adj 0.594

watertight

adj 0.593

invincible

adj 0.588

adamantine

adj 0.588

armoured

adj 0.585

waterproof

adj 0.585

waterproofed

adj 0.584

fail-safe

adj 0.583

strong as a horse

adj 0.579

flameproof

adj 0.576

rock hard

adj 0.573

undefeatable

adj 0.573

durable

adj 0.571

soundproof

adj 0.570

crashworthy

adj 0.565

unimpeachable

adj 0.563

tried and true

adj 0.563

no-fail

adj 0.561

secure

adj 0.560

inexpugnable

adj 0.559

unbroken

adj 0.558

rock-ribbed

adj 0.558

unflappable

adj 0.558

ruggedized

adj 0.556

overproof

adj 0.556

childproof

adj 0.554

time-tested

adj 0.553

fire-resistant

adj 0.553

well-fixed

adj 0.551

well-tried

adj 0.549

unshattered

adj 0.549

infallible

adj 0.549

stalwart

adj 0.548

copper-bottomed

adj 0.547

reinforced

adj 0.547

hardened

adj 0.545

unstoppable

adj 0.545

surefooted

adj 0.545

hard as nails

adj 0.544

made of sterner stuff

adj 0.544

unsinkable

adj 0.543

ironbound

adj 0.542

leakproof

adj 0.542

brassbound

adj 0.541

airtight

adj 0.541

up-armored

adj 0.541

strong

adj 0.540

unshaken

adj 0.540

dustproof

adj 0.539

resistant

adj 0.539

unbeatable

adj 0.538

unprotectable

adj 0.538

impervious

adj 0.537

unsusceptible

adj 0.535

rockbound

adj 0.533

hardy

adj 0.533

reliable

adj 0.532

indefeasible

adj 0.532

solid

adj 0.531

diehard

adj 0.531

unchallengeable

adj 0.530

safe and sound

adj 0.530

unflinching

adj 0.530

unquestionable

adj 0.530

infrangible

adj 0.529

trusty

adj 0.529

fortresslike

adj 0.529

undeterrable

adj 0.526

unfalsifiable

adj 0.525

indubitable

adj 0.525

inviolable

adj 0.525

stable

adj 0.524

proof

adj 0.523

irrefutable

adj 0.523

unimprovable

adj 0.523

safe

adj 0.522