There are multiple words that can be used interchangeably with the phrase "for a little while." Some of the most commonly used synonyms for this phrase include briefly, momentarily, temporarily, fleetingly, and shortly. These words are often used when referring to a short duration in which something will happen or when indicating that something will only take a brief amount of time to accomplish. Other synonyms that can also be used include briefly, transiently, and impermanently. Regardless of which synonym is used, they all convey the same meaning of a short or temporary amount of time.