"Make no mistake" is a commonly used phrase that is often used to emphasize a certain point or to clarify one's stance. However, there are several synonyms that can be used instead of this phrase, which can help add variety and depth to one's communication. Synonyms that can be used include "do not be fooled," "there is no doubt," "be assured," "to be crystal clear," "let me be clear," "there can be no doubt," and "make no error." These phrases can help convey a clear sense of certainty and conviction, making one's point more persuasive and impactful.