There are several synonyms for the phrase "grow angry." Some of the common ones include: become enraged, get livid, turn irate, flare up, lose one's temper, and fly into a rage. These phrases imply a sudden eruption of anger or a rapid escalation of emotions. Other synonyms may suggest a more gradual build-up of anger, such as simmering, seething, fuming, or boiling over. It is important to note that anger is a natural emotion, but it is also important to manage it constructively and avoid causing harm to oneself or others. There are many strategies for managing anger, including deep breathing, mindfulness practices, and seeking professional support when necessary.