Kiloyear is a term used to describe one thousand years. However, there are several other synonyms for this word that can be used interchangeably. For instance, millennium is a common term used to describe a period of one thousand years. Additionally, the word mille is also a suitable synonym for kiloyear as it means "thousand" in French. Other terms that can be used to mean one thousand years include epoch, age, and period. The ancient Greeks also used the term chiliad, which is derived from the Greek word "chilioi" meaning "thousand". Regardless of the terminology used, it is clear that a kiloyear refers to a significant period of time in human history.