Antonyms for the phrase "one's own choice" could include words like force, compulsion, obligation, or coercion. These terms suggest that someone or something else is making the decision for the individual, and they are not acting freely. Other antonyms might include the words imposed or dictated, which imply that the choice is being made by an external authority rather than the individual themselves. In contrast, synonyms for "one's own choice" could include terms like preference, decision, selection, or option, which emphasize the individual's freedom and agency in the decision-making process.