Assert oneself is a phrase that means to show confidence in oneself and one's abilities. Some synonyms for assert oneself include standing up for oneself, being assertive, showing courage, taking charge, being confident, presenting oneself, being forceful, commanding respect, and expressing oneself. These synonyms denote traits of self-confidence, conviction, and an assertive disposition. Asserting oneself is an essential skill to possess in both personal and professional settings, as it can help to express one's ideas and advocate for oneself effectively. Using synonyms for assert oneself can add more depth and variety to one's communication style and help to express oneself more clearly and purposefully.