"Most exteriorized" can be a difficult term to find synonyms for. However, there are a few options that may suit different contexts and situations. One possible synonym is "most visible," which can describe something that is outwardly apparent or easy to see. Another option is "most exposed," which can describe someone or something that is vulnerable or unprotected. A third possibility is "most conspicuous," which can describe something that stands out or draws attention. Depending on the context, other potential synonyms could include "most delineated," "most distinct," or "most palpable." Ultimately, the best synonym will depend on the context in which it is being used and the precise meaning that the writer wants to convey.