FAST-MOVING OBJECT is a term used to describe any object that moves quickly, such as a meteor or a comet. The two crossword solutions for this term are BLUR (4 letters) and BLUESTREAK (10 letters). BLUR is an adjective that means moving quickly and without clear definition, while BLUESTREAK is a noun that refers to a meteor that appears as a streak of blue light in the night sky. Both words accurately describe a fast-moving object.