"Tear into" is a verb that commonly means to attack or criticize someone or something intensely. There are different synonyms for this phrase depending on the context and the intensity of the attack. Some possible alternatives include: lash out, lambast, berate, censure, excoriate, vituperate, reprimand, scold, or assail. These words all convey a sense of strong rebuke or condemnation. However, it is important to consider the tone and intention behind these words and to use them appropriately. "Tear into" can be a powerful expression of anger or frustration, but it can also be hurtful and inflammatory if used carelessly.