A fortnighter refers to someone who takes a vacation or trip that lasts two weeks. However, there are various synonyms that can be used instead of a fortnighter. Some of these synonyms include a two-week vacationer, a fourteen-day traveler, a biweekly tourist, or a two-week holidaymaker. In addition, the term "fortnight" can also be replaced by "14 days," "two weeks," or "half a month," depending on the context. While these synonyms may not be commonly used, it is helpful to know them in case one needs to find alternate ways of expressing the same concept.