tough

verb 0.801

harden

verb 0.712

stiffen up

verb 0.706

strengthen

verb 0.677

stiffen

verb 0.664

soften up

verb 0.662

beef up

verb 0.661

firm up

verb 0.645

tighten up

verb 0.631

thicken

verb 0.622

tighten

verb 0.619

roughen

verb 0.619

indurate

verb 0.605

soften

verb 0.602

tone up

verb 0.597

man up

verb 0.594

rough up

verb 0.591

fortify

verb 0.588

bulk up

verb 0.587

stiff

verb 0.575

coarsen

verb 0.574

bear up

verb 0.571

sharpen

verb 0.567

intensify

verb 0.566

go hard

verb 0.566

solidify

verb 0.564

buck up

verb 0.561

rigidify

verb 0.560

tenderize

verb 0.556

fatten up

verb 0.555

weaken

verb 0.555

hardball

verb 0.553

hardship

verb 0.549

hearten

verb 0.548

embolden

verb 0.547

smarten up

verb 0.542

fasten up

verb 0.541

inure

verb 0.540

shape up

verb 0.539

bear down

verb 0.538

loosen up

verb 0.537

fort

verb 0.535

rough

verb 0.534

gruff

verb 0.533

deepen

verb 0.532

bombproof

verb 0.529

shockproof

verb 0.526

soften the blow

verb 0.524

refortify

verb 0.523

endure

verb 0.523

retighten

verb 0.523

worsen

verb 0.522

roughneck

verb 0.521

sweeten

verb 0.521

take courage

verb 0.520

staunch

verb 0.520

straiten

verb 0.519

buckle down

verb 0.519

darken

verb 0.519

bulk out

verb 0.517

brawn

verb 0.517

bulletproof

verb 0.515

steepen

verb 0.515

bolster

verb 0.514

shore up

verb 0.514

heighten

verb 0.514

hold firm

verb 0.512

suck it up

verb 0.512

fatten

verb 0.511

entrench

verb 0.510

tonify

verb 0.509

build up

verb 0.507

embrittle

verb 0.507

play hardball

verb 0.507

ruff

verb 0.506

reinforce

verb 0.505

fortress

verb 0.503

lengthen

verb 0.502

armor

verb 0.502

broaden

verb 0.501