SimilarityRank
difficulty 0.826 870
solve 0.748 2338
dilemma 0.698 4851
solving 0.688 60823
vexing 0.685 48295
level-of-analysis 0.684 65758
intractable 0.682 15377
trouble 0.680 1070
situation 0.661 598
insuperable 0.650 28053
polycentric 0.648 71584
free-rider 0.647 46022
over-consumption 0.647 67977
conundrum 0.642 24740
need 0.631 120
imponderable 0.629 36141
overuse 0.625 42709
pitfall 0.624 11534
unresolvable 0.623 72563
unem 0.622 75984
tackle 0.621 2441
jardea 0.618 92806
exacerbate 0.618 7936
here-and-now 0.617 78790
subproblem 0.615 96774