The phrase "of your own free will" is often used to indicate that something was done voluntarily and without coercion. However, there are several other synonyms that can be used to convey a similar meaning, such as "by choice", "voluntarily", "willingly", "unprompted", "self-determined", "autonomously", "spontaneously", "freely", "unforced", "without duress", and "by one's own volition". Using these synonyms in place of "of your own free will" can add variety to writing and communication while still conveying the same meaning. Ultimately, the choice of which synonym to use will depend on the context and intended tone of the sentence or phrase.