Opera singers are highly trained musicians who specialize in performing vocal works of opera. They are often referred to as 'opera stars' or 'divas'. 'Cantatrice' and 'prima donna' are terms used to describe female opera singers. 'Tenor', 'baritone', and 'bass' are synonyms used to describe male opera singers, depending on their vocal range. Other synonyms for opera singers are 'vocalists', 'sopranos', 'mezzosopranos', and 'contraltos'. 'Chanteuse' is a French term that refers to a female opera singer or a female nightclub singer of popular music. In short, opera singers come in various forms and ranges, and each has an important role in bringing to life the dramatic and expressive genre of opera.