" Ancillary proceeding" refers to a legal case that is related to but distinct from the primary case. Synonyms for ancillary proceeding include auxiliary proceeding, supplemental proceeding, additional proceeding, and secondary proceeding. It is a legal process that is initiated to support or supplement the primary case, and it usually pertains to issues that are related but not central to the main argument. Other synonyms for ancillary proceeding include derivative proceeding, incidental proceeding, and collateral proceeding. The ancillary proceeding is a necessary aspect of many types of legal cases, particularly those that require extensive documentation, evidence gathering, and fact-finding activities.