There are various synonyms for the phrase "free oneself of." These synonyms can be used to express the act of getting rid of something or someone, releasement, disentanglement, and liberation. The most commonly used synonyms for the phrase include unburden, clear out, discharge, rid oneself of, shake off, shed, release, let go, and detach. Each of these synonyms has its own specific connotation and use in different contexts. For instance, the term unburden may be used to express the act of releasing emotional or mental burdens, while rid oneself of may be used to describe the physical act of discarding something unwanted. Ultimately, the choice of synonym depends on the intended meaning and context of the sentence.