The phrase "twice monthly" refers to something that occurs twice a month or every other week. There are a few synonyms that can be used to describe this frequency, such as "bi-monthly", "fortnightly", or "semi-monthly". "Bi-monthly" can be confusing since it can also mean occurring every two months while "fortnightly" is commonly used in British English and may not be familiar to all audiences. "Semi-monthly" means twice a month on specific dates, such as the 1st and 15th of the month, whereas "twice monthly" can refer to any two dates in the month. It's always best to clarify the frequency to avoid any confusion.