Uttering an oath is a way of making a solemn promise or commitment. It is often done in a formal setting, such as a court of law, and is usually accompanied by a gesture such as raising one's right hand. The term 'utters an oath' can also be used to describe someone who makes a strong statement of commitment or loyalty. In this context, the word 'SWEARS' is an appropriate synonym for 'utters an oath'.