The phrase "of one's free will" implies a voluntary act or a choice made without coercion or force. Synonyms for this phrase include "willingly," "voluntarily," "freely," "unforced," "spontaneously," "intentionally," "unconstrained," and "deliberately." These words all convey the idea that the action was made with one's own consent and was not influenced or pressured by outside factors. Using synonyms for "of one's free will" can add variety and depth to your writing, making it more engaging and expressive. Whether you are writing an essay, a novel, or a letter, choosing the right words can help you convey your message more effectively.