inflexible

adj 0.787

stiff

adj 0.762

rigorous

adj 0.725

nonrigid

adj 0.712

strict

adj 0.696

unbending

adj 0.692

stringent

adj 0.676

unyielding

adj 0.675

hard-set

adj 0.673

hard-and-fast

adj 0.670

stiff as a board

adj 0.666

hidebound

adj 0.649

rock-ribbed

adj 0.640

immovable

adj 0.636

stiff as a poker

adj 0.630

rock hard

adj 0.627

hard

adj 0.627

hardheaded

adj 0.624

stubborn

adj 0.622

hardline

adj 0.619

hardened

adj 0.618

sturdy

adj 0.618

unmovable

adj 0.617

stiff-necked

adj 0.616

restrictive

adj 0.615

solid

adj 0.614

rugged

adj 0.614

tight

adj 0.609

constrained

adj 0.608

intransigent

adj 0.608

flexible

adj 0.607

adamant

adj 0.603

nondeformable

adj 0.603

adamantine

adj 0.601

obdurate

adj 0.599

unmoveable

adj 0.598

strait-laced

adj 0.597

olid

adj 0.597

strained

adj 0.595

inelastic

adj 0.594

staunch

adj 0.593

steadfast

adj 0.588

obstinate

adj 0.588

regimented

adj 0.586

taut

adj 0.586

nonelastic

adj 0.584

brittle

adj 0.583

non-strict

adj 0.582

resistant

adj 0.576

dogmatic

adj 0.574

ironclad

adj 0.573

ossified

adj 0.573

tough

adj 0.573

unmoving

adj 0.573

uncompromising

adj 0.571

rock-like

adj 0.571

hard-nosed

adj 0.568

immobile

adj 0.567

rugal

adj 0.564

rulebound

adj 0.561

restricting

adj 0.561

iron-hearted

adj 0.560

firm

adj 0.559

sclerotic

adj 0.559

resolute

adj 0.558

strictly proper

adj 0.558

restricted

adj 0.557

stonelike

adj 0.557

structured

adj 0.557

elastic

adj 0.556

indurated

adj 0.555

fibrous

adj 0.555

undeviating

adj 0.555

refractory

adj 0.555

bullheaded

adj 0.554

staid

adj 0.553

steely

adj 0.553

nonadjustable

adj 0.552

constant

adj 0.552

indurate

adj 0.551

stolid

adj 0.551

headstrong

adj 0.550

unwavering

adj 0.550

forcing

adj 0.549

unflinching

adj 0.549

concrete

adj 0.548

structural

adj 0.548

rubbery

adj 0.548

pigheaded

adj 0.547

dead set

adj 0.546

absolutist

adj 0.546

unrelenting

adj 0.546

stoic

adj 0.546

semiconstrained

adj 0.546

constrictive

adj 0.545

harsh

adj 0.544

moveless

adj 0.544

rigged

adj 0.543

robust

adj 0.543

strong

adj 0.540