Related by context. Frequent words. (Click for all words.) 56 contentious 52 problematic 46 tricky 45 complicated 43 daunting 42 controversial 42 troubling 39 pressing 38 divisive 37 costly 37 confusing 37 unresolved 36 unpopular 36 intriguing 35 awkward 35 elusive 35 annoying 35 myriad 34 messy 34 difficult 34 formidable 34 lingering 33 obscure 33 issues 33 delicate 33 crucial 33 disputes 32 dilemma 32 problem 32 complex 32 troubles 32 perennial 31 important 31 resolving 31 notably 31 tempting 31 useful 31 persistent 31 straightforward 31 prominent 31 key 30 troubled 30 crippling 30 stubborn 30 questionable 30 uncomfortable 30 obstacle 30 lucrative 30 problems 30 obvious 30 nasty 30 embarrassing 30 toughest 30 solved 30 dubious 30 challenging 30 notorious 30 issue 30 dogged 29 unusual 29 confronting 29 unpleasant 29 popular 29 sensitive 29 longstanding 29 helpful 29 easiest 29 tough 29 risky 29 dangerous 29 woes 29 frustrating 29 mystery 29 powerful 29 headache 28 unwanted 28 potent 28 ubiquitous 28 ineffective 28 interesting 28 painful 28 serious 28 major 28 distraction 28 longtime 28 familiar 28 dispute 28 clever 28 obstacles 28 solving 28 pivotal 28 wide ranging 28 protracted 28 unfamiliar 27 controversy 27 embattled 27 dominant 27 plague 27 bizarre 27 solve 27 entrenched