"Dropdead lists" refer to the final or absolute lists of things that are considered critical or essential. Synonyms for this commonly used term can include the terms "essential roster," "vital list," "critical index," or "significant catalog." Each of these synonymic phrases emphasizes the importance of the items on the list, or the urgency of the actions that need to be taken based on the items listed. Depending on the context, the use of different terms can add variety to one's writing or speech and help convey how essential the listed items are for a given situation.