The phrase "for fun" can be replaced with a variety of synonyms depending on the context. Some examples of synonyms for "for fun" include "as a pastime," "as a hobby," "as a diversion," "for amusement," "just for kicks," "as entertainment," "for pleasure," "as a leisure activity," "for recreation," "for enjoyment," "as a lark," and "for a laugh." Each of these phrases conveys the idea of engaging in an activity without serious intent or purpose, simply for the sake of enjoying oneself. Whatever the synonym used, they all express the same idea of doing something for the sheer enjoyment of it.