The crossword solution for the term 'Word with Base or Ball' is AIR, which is a three-letter word. AIR is a naturally occurring gaseous mixture composed of nitrogen, oxygen, and other gases found in the Earth's atmosphere. It is an essential component of life, providing oxygen for respiration and helping to regulate temperature. AIR can also be used to describe a state of being, such as being in the AIR when playing a sport like baseball or basketball.