Related by context. Frequent words. (Click for all words.) 34 costly 30 unnecessary 28 expensive 28 painful 28 risky 26 complicated 25 harmful 24 disastrous 23 rigorous 22 cheaper 21 catastrophic 21 prolonged 21 consuming 21 effective 21 beneficial 21 convenient 21 costing 20 hazardous 20 tricky 20 difficult 20 potentially 20 complex 20 delays 20 stringent 19 daunting 19 problematic 19 rewarding 19 straightforward 19 cost 19 successful 18 desirable 18 lengthy 18 inadequate 18 serious 17 distraction 17 deadly 17 efficient 17 devastating 17 flawed 16 plagued 16 intensive 16 predictable 16 ineffective 16 dangerous 16 costs 16 frustrating 16 damaging 16 conventional 16 prone 16 simple 16 too 16 require 15 unpopular 15 embarrassing 15 lucrative 15 easier 15 avoiding 15 proved 15 avoid 15 profitable 15 confusing 15 harder 14 destructive 14 frequent 14 worthwhile 14 annoying 14 easiest 13 easy 13 sometimes 13 sophisticated 13 ultimately 13 inevitable 13 unsuccessful 12 inaccurate 12 delaying 12 outdated 12 often 11 afford 11 necessity 11 necessary 11 controversial 11 requiring 11 viable 11 vulnerable 10 impossible 10 boring 10 inevitably 9 productive 9 cheap 9 doomed 9 scarce 9 contentious 8 reliable 8 Opponents 8 silly 8 large scale 8 crucial 7 likely 7 useful 4 forcing 3 valuable