The phrase "be necessitated" means to be required or compelled to do something. Some synonyms for this phrase include "be obligated," "be duty-bound," "be mandated," "be forced," "be pressed," and "be compelled." These words all convey a sense of strong obligation, suggesting that the action in question is not optional or discretionary. Using a synonym for "be necessitated" can add variety to your writing and help you to express your ideas in different ways. Whether you're writing a formal essay or a casual email, using synonyms can help you to communicate more effectively and capture your reader's attention.