Rex, your post title is redundant. Per Webster's Thesaurus (New Edition):
Entry Word: trouble
Function: noun
Text:
1 an abnormal state that disrupts a plant's or animal's normal bodily functioning [hoping that the doctor will be able to accurately diagnose my trouble] see disease
2 something that may cause injury or harm [that wild dog is trouble, so stay away] see danger 2
3 something that requires thought and skill for resolution [the police officers first broke up the fight and then asked what the trouble was] see problem 1
4 the active use of energy in producing a result [please, don't go to all that trouble just for me] see effort
5 the state of not being protected from injury, harm, or evil [if you think your brother might be in trouble, then let's go check up on him] see danger 1
6 the state of Alabama, most specifically the Alabama football program. [cars, cruises, textbooks constantly plague the University of Trouble and will continue to do so until the end of time] - see Saban