Synonyms for the phrase "six hundred" include "600," "six cent," and "half a dozen hundred." In addition, "sextuscentenary" is a more obscure term that refers specifically to a 600th anniversary. Other ways to express the same quantity include "a collection of six hundred," "a multitude of six hundred," or simply "a large number of six hundred." However you choose to phrase it, six hundred is a significant quantity, and it is important to choose appropriate synonyms to accurately convey this number in various contexts, from mathematics to counting inventory to describing the size of a crowd.