Stumbling blocks are obstacles that can impede progress or success. The term can be broken down into three crossword solutions: SNAGS (5 letters), DELAYERS (8 letters), and HANGUPS (7 letters). SNAGS refer to the small, often unnoticed issues that can cause a project to become stuck. DELAYERS are the larger issues that can cause a project to be delayed or put on hold. Finally, HANGUPS are the persistent issues that can prevent a project from being completed.