Megacorps are large corporations that have a significant influence in their respective markets. While the term "megacorps" has become more common in recent years, there are several synonyms that can be used to refer to these massive organizations. "Multinational corporations," "global corporations," and "mega-companies" are all alternative phrases that can be used to describe megacorps. Other similar terms include "corporate giants," "big businesses," and "large enterprises." These synonyms all convey the idea of large-scale operations and significant market dominance. However, it is worth noting that these companies can also face criticism and scrutiny for their impact on society and the economy.