problem

[1]	difficulty , job , trouble , question , dilemma , quandary , predicament , complication , hornet's nest , imbroglio , mess , muddle , stew , (Colloq) can of worms , fine kettle of fish , (pretty) pickle , (Brit) facer
[2]	puzzle , conundrum , poser , riddle , question , enigma , puzzler , (Colloq) mind-boggler , hard/tough nut to crack
[3]	trouble

adj.

[1]	unruly , unmanageable , intractable , uncontrollable , difficult , ungovernable , refractory , incorrigible , obstreperous , delinquent , maladjusted , disturbed , emotionally upset