An opera star is a highly trained and talented singer who specializes in performing operatic roles. One synonym for an opera star is a diva. This term is often used to describe a female opera singer who has attained a high level of fame and success. Another synonym for an opera star is a prima donna, which comes from the Italian word for "first lady." This term is also often used to describe a female singer who is considered a leading performer in the field of opera. Other synonyms for an opera star include tenor, baritone, mezzo-soprano, and contralto, depending on the specific voice type and range of the singer.