The term "be flower" can be interpreted in a couple of ways, but one possible meaning is to refer to the state of blooming or being in full bloom. Some synonyms for this expression could include "blossom," "bloom," "flourish," "thrive," "prosper," or "mature." Other possible interpretations of "be flower" may involve references to floral scents and aromas, in which case synonyms might include "fragrance," "perfume," "scent," "aroma," "smell," or "odor." Ultimately, the exact synonyms for "be flower" will depend on the specific context and intended meaning of the phrase.