Solutions Source of great trouble has 5 entries with similar clues

• 5-letter words
• stoicSomeone who shows great self-control in times of trouble
• 6-letter words
• terrortroublesome child causing great panic
• 11-letter words
• tribulationGreat trouble or suffering
• pandorasboxsource of concealed troubles
• 12-letter words
• pandoras-boxSource of extensive but unforeseen troubles