ironclad

adj 0.682

rockbound

adj 0.671

brassbound

adj 0.650

bound

adj 0.627

iron-hearted

adj 0.625

iron

adj 0.608

hardbound

adj 0.591

binding

adj 0.577

hardened

adj 0.575

icebound

adj 0.573

rock-ribbed

adj 0.571

cast iron

adj 0.570

leatherbound

adj 0.569

indurated

adj 0.566

bounded

adj 0.560

fenced

adj 0.558

protected

adj 0.557

hard-set

adj 0.556

ringfenced

adj 0.554

bonded

adj 0.553

fenced in

adj 0.553

bulletproof

adj 0.551

case hardened

adj 0.550

immured

adj 0.548

armored

adj 0.542

bombproof

adj 0.542

shackled

adj 0.541

fettered

adj 0.540

casebound

adj 0.539

rock hard

adj 0.538

fire brick

adj 0.537

rulebound

adj 0.537

hidebound

adj 0.537

iron gray

adj 0.537

fortresslike

adj 0.536

locked

adj 0.533

bastioned

adj 0.530

musclebound

adj 0.529

chained

adj 0.528

armoured

adj 0.527

indurate

adj 0.526

hard put

adj 0.525

hard

adj 0.525

adamantine

adj 0.524

strapped

adj 0.524

hard-and-fast

adj 0.523

steel

adj 0.523

hardpacked

adj 0.522

hard as nails

adj 0.518

shored

adj 0.515

hardy

adj 0.513

olid

adj 0.512

strapping

adj 0.512

impregnable

adj 0.511

guarded

adj 0.511

castled

adj 0.511

snowbound

adj 0.511

sturdy

adj 0.510

earthbound

adj 0.509

metal

adj 0.509

hardenable

adj 0.509

unhardened

adj 0.508

hardcover

adj 0.507

indentured

adj 0.506

hard-nosed

adj 0.505

rugged

adj 0.505

unbroken

adj 0.505

fireproof

adj 0.505

airtight

adj 0.504

hafted

adj 0.504

barded

adj 0.503

strong

adj 0.503

prebound

adj 0.502

unbreakable

adj 0.502

caged

adj 0.502

bone

adj 0.501

fit to be tied

adj 0.501

bond

adj 0.500

softbound

adj 0.500