The term 'worrier about things that might happen' can be summarized as a 'FUSSPOT, ' which is a seven-letter word. A FUSSPOT is someone who worries excessively about potential problems or dangers that may arise in the future. This person is often anxious and fretful, and may become overly concerned with details or minor issues. Fusspots are typically characterized by their tendency to worry and fret over things that may never actually happen.