The phrase "are proud of" is commonly used to express admiration, satisfaction, or a sense of accomplishment for someone or something. However, there are several synonyms that can be used in place of this phrase to convey the same meaning. Some appropriate options may include phrases such as "take pride in," "esteem," "relish," "cherish," "delight in," or "hold in high regard." Each of these terms can be used in different contexts and may be more or less appropriate depending on the situation. Nevertheless, they all suggest admiration or satisfaction with the subject, and can help to express a positive and supportive attitude towards someone or something.