Infinitude is a term used to describe the concept of something that is infinite or without end. It is often used in contrast to the concept of ETERNITY, which is also infinite but is usually seen as having a more spiritual or religious connotation. The crossword solutions for the term infinitude are 'INFINITY' (8 letters) and 'ETERNITY' (8 letters). INFINITY is a mathematical concept that refers to something that has no boundaries or limits, while ETERNITY is a philosophical concept that refers to an infinite amount of time.