The term "innumerableness" refers to the state or quality of being countless or infinite. There are several synonyms for this word that convey a similar meaning. "Infinity," "endlessness," and "limitlessness" all suggest the idea of an uncountable or immeasurable quantity. "Myriad," "multitude," and "countless" are also words that describe a vast and indefinite number. "Abundance," "profusion," and "plentitude" refer to a great quantity or supply of something. "Perpetuity" suggests the concept of eternity and endlessness. These words can be used interchangeably with "innumerableness" to describe a concept or object that cannot be measured or counted in any finite way.