Czaritza is a word of Russian origin, used to refer to the wife of a czar or emperor. As such, it's not used frequently in English, and there are few synonyms that convey the exact same meaning. Some possible alternatives might include empress, queen consort, or imperial consort, depending on the context. Of course, each of these terms has its own unique connotations and associations, so it's important to consider the specific tone and purpose of your writing when choosing between them. Ultimately, the best synonym for czaritza will depend on the precise nuance you're hoping to convey.