Here you go! =) (you should use this web:
http://encarta.msn.com/encnet/features/dictionary/DictionaryResults.aspx?lextype=2&search=difficult)
1: hard, tricky, complicated, thorny, complex, intricate, knotty
2: (cannot find any)
3:next, subsequent, succeeding, ensuing, resulting
4:job, chore, duty, mission, commission, assignment, charge, undertaking, errand, brief
5:dissimilar, diverse, unlike, poles apart, unalike, changed, altered, not the same, unusual, special, singular, distinctive, atypical, out of the ordinary, uncommon, unique
6:keen, staunch, dedicated, firm, fanatical, zealous, eager, fervent, great, intense, deep, deep-seated, fierce, powerful, potent, passionate, ardent, convincing, sound, clear, clear-cut, persuasive, compelling, effective, formidable, glaring, dazzling, bright, stark, brilliant, intense, concentrated, pungent, piquant, spicy, hot, biting, intense, sharp, robust, sturdy, stout, durable, solid, resilient, tough, heavy-duty, hard-wearing, powerful, burly, brawny, muscular, strapping, sturdy, well-built, beefy, stalwart, tough
7: (cannot find any)
8:impressive, stately, majestic, noble, magnificent, great, grand, lordly,independent, self-sufficient, dignified, scrupulous, honorable, self-respecting, rewarding, satisfying, pleasurable, pleasing, uplifting, fulfilling, arrogant, conceited, smug, self-important, self-righteous, bigheaded, egotistical, vain, self-satisfied, overbearing, superior, pompous,pleased, satisfied, gratified, honored, delighted, fulfilled, projecting, prominent, jutting, bulging, protrusive, sticking out
9: (cannot find any)
