hard

adj 0.744

sturdy

adj 0.705

tough

adj 0.670

hard-set

adj 0.657

hardened

adj 0.653

stouthearted

adj 0.651

hard put

adj 0.645

hardenable

adj 0.644

resilient

adj 0.640

diehard

adj 0.639

hearty

adj 0.638

resistant

adj 0.635

robust

adj 0.632

hard-nosed

adj 0.623

rugged

adj 0.619

hard as nails

adj 0.615

rock hard

adj 0.613

hardball

adj 0.611

hardwood

adj 0.608

made of sterner stuff

adj 0.603

stout

adj 0.602

brave

adj 0.600

hardheaded

adj 0.599

unhardened

adj 0.598

steadfast

adj 0.598

durable

adj 0.597

stalwart

adj 0.596

strong

adj 0.591

hardhearted

adj 0.590

hard-boiled

adj 0.587

hardline

adj 0.586

harsh

adj 0.585

headstrong

adj 0.584

iron-hearted

adj 0.584

valiant

adj 0.583

hardscrabble

adj 0.578

enduring

adj 0.577

case hardened

adj 0.576

hardcover

adj 0.573

fortis

adj 0.572

staunch

adj 0.564

stiff

adj 0.564

hard-won

adj 0.563

arduous

adj 0.562

resolute

adj 0.562

nonresistant

adj 0.560

rocky

adj 0.560

hare

adj 0.558

gutsy

adj 0.558

endurable

adj 0.556

hard-featured

adj 0.556

firm

adj 0.556

hardback

adj 0.556

strong-willed

adj 0.556

difficult

adj 0.555

stubborn

adj 0.555

unbreakable

adj 0.555

ruggedized

adj 0.554

indurated

adj 0.553

indurate

adj 0.553

mettle

adj 0.553

hoar

adj 0.553

adamant

adj 0.551

adamantine

adj 0.549

plucky

adj 0.548

able

adj 0.548

daredevil

adj 0.547

gutty

adj 0.547

ironclad

adj 0.547

dogged

adj 0.547

semihard

adj 0.546

dauntless

adj 0.545

olid

adj 0.545

unyielding

adj 0.545

leather-hard

adj 0.545

forte

adj 0.542

hard-and-fast

adj 0.542

hearted

adj 0.541

robustious

adj 0.541

tenacious

adj 0.540

rock-ribbed

adj 0.540

survivable

adj 0.536

well-fixed

adj 0.535

perseverant

adj 0.534

antifragile

adj 0.534

gamely

adj 0.533

intrepid

adj 0.533

heavy

adj 0.533

perdurable

adj 0.533

bombproof

adj 0.533

fragile

adj 0.532

heathy

adj 0.532

flinty

adj 0.531

abled

adj 0.531

rigid

adj 0.531

hard-charging

adj 0.531

unbroken

adj 0.530

bold

adj 0.530

steady

adj 0.529

shockproof

adj 0.529