There are several synonyms for the phrase "amusing oneself". Some of the most commonly used include "entertaining oneself", "occupying oneself", "diverting oneself", and "engaging oneself". Other synonyms can include "passing time", "killing time", "idling away the hours", "enjoying oneself", and "having fun". No matter which synonym you choose to use, the concept remains the same- finding enjoyable activities to occupy oneself and pass the time. This can involve anything from reading a book, watching a movie, playing a game, or simply daydreaming. The important thing is finding something engaging and enjoyable to do for oneself.