"Be of" is a phrasal verb that indicates the quality or state of something or someone. However, there are other alternative words that can be used instead of "be of." Some of these synonyms may include "possess," "show," "have," "display," "demonstrate," "exhibit," "indicate," "embody," "represent," and "constitute." These synonyms can help in bringing more variety and precision to one's writing or speech. For example, instead of saying "The restaurant is of a high standard," one can use "The restaurant exhibits a high standard," or "The restaurant embodies quality." These synonyms can enrich one's vocabulary and help in conveying a clearer message.