What is another word for retro-active?
Pronunciation: [ɹˌɛtɹə͡ʊˈaktɪv] (IPA) 
Retro-active is a term used to describe an action that is applied to a past event or situation. There are a variety of synonyms that can be used in place of retro-active, including retrospective, backdated, historical, and retrogressively, among others. Retrospective refers to a review or analysis of past events, while backdated emphasizes the process of assigning a date to an event that has already occurred. Historical is used to describe something that has occurred in the past and is important for understanding the present. Retrogressively refers to an action that moves backwards in time or reverses progress. Overall, these synonyms for retro-active each carry slightly different nuances, depending on the context in which they are used.
