The phrase 'It's one thing after another' can be represented by six different words in a crossword puzzle: LIST (4 letters), PARADE (6 letters), ROW (3 letters), CHAIN (5 letters), SERIAL (6 letters), and SERIES (6 letters). A LIST is an organized collection of items, while a PARADE is a procession of people or vehicles. A ROW is a line of objects placed side by side, and a CHAIN is a SERIES of connected links. SERIAL and SERIES both refer to a succession of related things that follow each other in order. Therefore, the phrase 'It's one thing after another' can be interpreted as a continuous sequence of events or objects.