The word "direr" is an adjective that describes a situation or condition as desperate, severe, or urgent. There are several synonyms that can be used in place of "direr" in order to convey the same meaning. Some suitable synonyms include perilous, grave, critical, urgent, crucial, and pressing. All these words are typically used when a situation is becoming increasingly severe and requires immediate attention or action. Other synonyms for "direr" might include desperate, serious, or alarming. Whatever the word choice, the goal is to convey the gravity and importance of the situation at hand.