The phrase "grows up" refers to the process of maturing and developing into an adult. There are numerous synonyms that can be used instead of "grows up" to express this concept in different ways. Some of these synonyms include "matures," "develops," "evolves," "progresses," "advances," "blossoms," "unfolds," "ripen," "flourishes," "thrives," and "blossoms." Each of these synonyms has its own nuances and can be used in different contexts to convey different meanings. By using different synonyms, writers and speakers can add variety and depth to their language, creating a more engaging and dynamic style of communication.