Someone Who Dwells on Problems and Anxieties

This page is the CodyCross answer for the clue below from Train Travel, Group 718, Puzzle 2 (Delays and Strikes).

Question is: Someone Who Dwells on Problems and Anxieties

and the answer is: WORRYWART

Word Meaning:

WORRYWART — (originally US) A person who worries excessively, especially about unimportant matters.

Definitions from Wiktionary.