Fortieths is a plural noun referring to a divided whole that consists of 40 equal parts or portions. There are several synonyms for fortiehts, which can be used interchangeably to convey the same meaning. These synonyms include fortieth part, fortieth share, fortieth division, 1/40th, or 2.5 percent. These synonyms are commonly used in mathematical and financial contexts, such as calculating percentages, interest rates, or dividends. Additionally, they can also be used in everyday conversations to describe fractions of a whole, such as fortieths of a cake or fortieths of a mile. Overall, synonyms for fortiehts are versatile and useful in various contexts.