problem

noun 0.692

challenger

noun 0.666

contest

noun 0.659

difficulty

noun 0.640

rechallenge

noun 0.626

issue

noun 0.618

task

noun 0.594

contestation

noun 0.591

competition

noun 0.588

struggle

noun 0.587

battle

noun 0.584

dare

noun 0.583

change

noun 0.582

project

noun 0.577

question

noun 0.575

open problem

noun 0.574

obstacle

noun 0.572

hurdle

noun 0.571

changer

noun 0.568

quest

noun 0.567

attempt

noun 0.560

condition

noun 0.559

chase

noun 0.556

fight

noun 0.553

combat

noun 0.551

uphill battle

noun 0.551

clash

noun 0.550

threat

noun 0.549

constraint

noun 0.548

contending

noun 0.545

overcome

noun 0.541

confrontation

noun 0.540

dispute

noun 0.540

will contest

noun 0.535

chance

noun 0.534

chang

noun 0.532

critical

noun 0.531

overcoming

noun 0.531

charge

noun 0.530

argument

noun 0.530

debate

noun 0.530

tournament

noun 0.529

champ

noun 0.528

jeopardy

noun 0.527

problematic

noun 0.526

cause

noun 0.525

battling

noun 0.524

hurdles

noun 0.522

urge

noun 0.522

risk

noun 0.522

achievement

noun 0.521

error

noun 0.520

claim

noun 0.519

problem space

noun 0.518

problema

noun 0.518

controversy

noun 0.518

obstacle race

noun 0.517

conflict

noun 0.517

trying

noun 0.517

trial

noun 0.517

campaign

noun 0.517

mission

noun 0.516

choice

noun 0.516

goal

noun 0.516

puzzle

noun 0.515

discussion

noun 0.515

champion

noun 0.515

benchmark

noun 0.515

demand

noun 0.514

championship

noun 0.514

gauntlet

noun 0.512

crisis

noun 0.512

test

noun 0.511

trouble

noun 0.510

mountain to climb

noun 0.510

questioning

noun 0.509

callback

noun 0.509

tackling

noun 0.509

provoking

noun 0.509

match

noun 0.508

game

noun 0.508

daring

noun 0.507

chancing

noun 0.507

endeavour

noun 0.507

cross

noun 0.506

comparison

noun 0.505

compare

noun 0.505

tussle

noun 0.505

scenario

noun 0.504

contender

noun 0.503

battel

noun 0.503

chal

noun 0.503

parison

noun 0.502

assignment

noun 0.502

prompt

noun 0.501

proposal

noun 0.501

crit

noun 0.500