There are several synonyms that can be used to describe the expression "are a target". Some are "are in the crosshairs", "are in the firing line", "are marked", "are under attack", "are under fire", "are vulnerable" and "are subject to scrutiny". These words are often used in situations where someone or something is the recipient of criticism, negative attention or facing a potential danger. Using alternative synonyms can add variety to your writing and help avoid repetition of the same phrases. It's important to choose the most fitting expression for the context in order to create a clear and effective communication.