"Continuate" is a rarely used word in modern English language that refers to something that endures or persists without interruption. There are several synonyms for "continuate" that can be used interchangeably to convey a similar meaning. Some of the potential synonyms include "continuous," "ongoing," "uninterrupted," "sustained," "perpetual," "incessant," and "persistent." These words indicate a sense of something ongoing, without pause or interruption, indicating a constant flow in time or in a process without breaks. It is important to note that the context in which these words are used may slightly vary, but all of them communicate the idea of enduring without interruption.