What is another word for sesquiennial?
Pronunciation: [sˌɛskwɪˈɛnɪəl] (IPA) 
The word "sesquiennial" refers to a period of 18 months or one and a half years. Although this term is relatively uncommon, there are several synonyms that can be used in its place. These include the phrases "year and a half" or "eighteen months." The terms "one and a half year" or "a year and six months" are also commonly used. Additionally, the word "semi-annual" can be used to describe events that occur twice a year, such as a meeting or report, which can encompass a sesquiennial period. Ultimately, while "sesquiennial" may not be widely used, there are several alternatives that can effectively convey the same meaning.
