breakable

noun 0.789

invincible

noun 0.712

undefeatable

noun 0.694

indestructibility

noun 0.665

invincibility

noun 0.633

impregnability

noun 0.629

unassailable

noun 0.626

immutable

noun 0.616

unmatchable

noun 0.607

immovable

noun 0.597

unchangeable

noun 0.597

undoable

noun 0.596

bombproof

noun 0.595

invulnerability

noun 0.593

impenetrable

noun 0.585

brokenness

noun 0.581

indomitability

noun 0.580

breaking

noun 0.579

imperishable

noun 0.577

untouchable

noun 0.576

impossible

noun 0.568

inviolability

noun 0.564

physical break

noun 0.563

indivisible

noun 0.561

undatable

noun 0.559

frangible

noun 0.558

unflappability

noun 0.558

unconditional

noun 0.557

unobtainable

noun 0.555

inseparable

noun 0.554

unteachable

noun 0.553

unanswerable

noun 0.552

fragile

noun 0.551

unpredictable

noun 0.551

breaker

noun 0.550

unchangeability

noun 0.549

undefinable

noun 0.549

ironclad

noun 0.549

durable

noun 0.549

uninsurable

noun 0.548

indivisibility

noun 0.546

indefinable

noun 0.545

unreachable

noun 0.543

breakage

noun 0.543

unarguable

noun 0.542

infallible

noun 0.541

unchangeableness

noun 0.540

incorruptible

noun 0.538

invariant

noun 0.538

unworkable

noun 0.535

everlasting

noun 0.534

indubitable

noun 0.532

invariable

noun 0.532

unwearable

noun 0.532

incurable

noun 0.530

uncountable

noun 0.530

unique

noun 0.529

irredeemable

noun 0.529

incomparable

noun 0.528

imperishability

noun 0.526

indefeasibility

noun 0.526

unknowable

noun 0.526

sturdy

noun 0.525

unprintable

noun 0.525

uncopyrightable

noun 0.524

irreducible

noun 0.524

unattainable

noun 0.523

invar

noun 0.523

nonnegotiable

noun 0.522

unreconcilable

noun 0.521

impenetrability

noun 0.521

undeniability

noun 0.520

unblock

noun 0.520

shatter

noun 0.520

toughness

noun 0.520

unseen

noun 0.519

uninjured

noun 0.519

nondurable

noun 0.519

irresistibility

noun 0.518

durability

noun 0.518

untranslatable

noun 0.517

nonreturnable

noun 0.516

break

noun 0.516

brittle

noun 0.515

imperviousness

noun 0.515

indissolubility

noun 0.515

inner strength

noun 0.515

unquantifiable

noun 0.513

incorrigible

noun 0.513

superstrength

noun 0.511

immutability

noun 0.511

freezable

noun 0.510

intactness

noun 0.510

nonperishable

noun 0.510

brick wall

noun 0.509

inimitability

noun 0.508

immortal

noun 0.507

unavoidable

noun 0.507

tough nut to crack

noun 0.506

resistant

noun 0.506