Most externalized is an expression that refers to something that is highly visible and easily perceived from the outside. There are several synonyms for the word "most externalized" that can be used to describe the same concept. Some of these words include overt, conspicuous, prominent, noticeable, apparent, evident, and manifest. Each of these words can be used interchangeably with most externalized to describe something that is obvious, observable, and easily detected. When looking for an appropriate synonym for most externalized, it's important to choose a word that accurately captures the intended meaning and emphasizes the external nature of the object or concept being described.