hardheaded

adj 0.754

hard as nails

adj 0.739

hardball

adj 0.737

hard

adj 0.735

hard-boiled

adj 0.728

hard-set

adj 0.719

hardline

adj 0.712

hard-charging

adj 0.706

bullheaded

adj 0.690

hard-featured

adj 0.681

tough

adj 0.674

hardhearted

adj 0.672

diehard

adj 0.668

hard put

adj 0.665

rock hard

adj 0.653

iron-hearted

adj 0.649

hard-and-fast

adj 0.641

harsh

adj 0.637

headstrong

adj 0.637

hardened

adj 0.633

hardscrabble

adj 0.631

take-no-prisoners

adj 0.630

hardy

adj 0.623

rigorous

adj 0.620

dogged

adj 0.610

adamant

adj 0.608

rock-ribbed

adj 0.605

strong-willed

adj 0.603

uncompromising

adj 0.600

stubborn

adj 0.598

pigheaded

adj 0.594

unyielding

adj 0.594

staunch

adj 0.594

serious-minded

adj 0.593

made of sterner stuff

adj 0.592

gritty

adj 0.586

stony-faced

adj 0.585

ornery

adj 0.583

bullet-headed

adj 0.580

high-nosed

adj 0.579

flinty

adj 0.575

unflinching

adj 0.574

rugged

adj 0.573

tenacious

adj 0.572

steely

adj 0.571

gutsy

adj 0.570

stiff

adj 0.568

stouthearted

adj 0.568

rigid

adj 0.568

indurate

adj 0.566

unsparing

adj 0.566

ironclad

adj 0.565

hidebound

adj 0.565

hardwood

adj 0.565

ruthless

adj 0.563

strait-laced

adj 0.562

obdurate

adj 0.560

cutthroat

adj 0.559

stringent

adj 0.558

obstinate

adj 0.558

resolute

adj 0.557

hell-bent

adj 0.556

strict

adj 0.556

dour

adj 0.556

stubborn as a mule

adj 0.556

hardback

adj 0.556

hawkish

adj 0.555

sturdy

adj 0.555

thickheaded

adj 0.555

stiff-necked

adj 0.555

case hardened

adj 0.554

hard hit

adj 0.553

hardworking

adj 0.553

callous

adj 0.552

hardpressed

adj 0.549

gruff

adj 0.549

bold as brass

adj 0.548

determined

adj 0.548

dead set

adj 0.548

steadfast

adj 0.547

hard-won

adj 0.547

unhardened

adj 0.547

unforgiving

adj 0.546

hardpacked

adj 0.544

callused

adj 0.543

hardcover

adj 0.543

indurated

adj 0.542

businesslike

adj 0.542

unrelenting

adj 0.541

arduous

adj 0.540

blunt

adj 0.540

gutty

adj 0.539

rough and ready

adj 0.538

unbending

adj 0.538

concrete

adj 0.536

hardenable

adj 0.536

stalwart

adj 0.536

pertinacious

adj 0.535

stiff as a poker

adj 0.534

disciplinarian

adj 0.533