impenetrable

noun 0.855

imperviousness

noun 0.758

impermeability

noun 0.756

impregnability

noun 0.750

penetrability

noun 0.742

impassibility

noun 0.709

incompressibility

noun 0.657

inaccessibility

noun 0.636

impenitence

noun 0.632

unapproachability

noun 0.626

immovability

noun 0.594

permeability

noun 0.592

implacability

noun 0.591

incomprehensibility

noun 0.591

impossibility

noun 0.588

inscrutability

noun 0.588

imperceptibility

noun 0.586

insusceptibility

noun 0.585

inaccessible

noun 0.585

insolubility

noun 0.577

inexorability

noun 0.577

indestructibility

noun 0.573

inimitability

noun 0.572

inviolability

noun 0.570

impressibility

noun 0.566

immutability

noun 0.565

inconceivability

noun 0.563

opaqueness

noun 0.561

imperforate

noun 0.560

invincibility

noun 0.559

intractability

noun 0.558

intangibility

noun 0.558

indissolubility

noun 0.555

indiscernibility

noun 0.555

nontransparency

noun 0.554

impeccability

noun 0.553

impenitent

noun 0.552

indivisibility

noun 0.550

incommensurability

noun 0.549

irresistibility

noun 0.546

inability

noun 0.545

invulnerability

noun 0.544

impermissibility

noun 0.544

untranslatability

noun 0.543

imperishability

noun 0.542

irreconcilability

noun 0.541

permeation

noun 0.541

penetratin

noun 0.540

indecipherability

noun 0.538

penetrator

noun 0.536

unsolvability

noun 0.536

inflexibility

noun 0.535

impracticability

noun 0.535

incompatibility

noun 0.534

impassiveness

noun 0.534

imped

noun 0.533

impedance

noun 0.532

immateriality

noun 0.532

incorruptibility

noun 0.531

obduracy

noun 0.529

insensibility

noun 0.529

impossible

noun 0.528

nonseparability

noun 0.527

indomitability

noun 0.526

ignorability

noun 0.526

unchangeableness

noun 0.526

inalienability

noun 0.525

permeance

noun 0.525

unknowability

noun 0.524

indigestibility

noun 0.523

incomparability

noun 0.522

impediment

noun 0.522

unbreakable

noun 0.521

inseparability

noun 0.521

imperturbability

noun 0.519

unavoidability

noun 0.518

impalement

noun 0.517

unchangeability

noun 0.515

invisibility

noun 0.515

unspeakability

noun 0.514

insoluble

noun 0.514

incapability

noun 0.513

impassivity

noun 0.513

watertightness

noun 0.512

impaction

noun 0.512

inertness

noun 0.512

impracticality

noun 0.511

incomprehensible

noun 0.510

impasse

noun 0.509

pertinacity

noun 0.509

inelasticity

noun 0.508

undoable

noun 0.508

inapplicability

noun 0.508

unenforceability

noun 0.508

penetration test

noun 0.508

unintelligibility

noun 0.508

imponderable

noun 0.507

infeasibility

noun 0.505

unresectability

noun 0.505

porousness

noun 0.505