Non-systematically is an adverb that describes an action or process that is done in an unplanned or haphazard manner. There are a variety of synonyms that can be used to convey a similar meaning, depending on the context of the sentence. Some possible synonyms for non-systematically include randomly, sporadically, haphazardly, chaotically, aimlessly, erratically, disconnectedly, and inconsistently. Each of these words helps to describe an action or process that lacks organization or structure, and suggests that there is no clear pattern or plan guiding the behavior. When writing or speaking, it is important to choose the most appropriate synonym for your intended meaning in order to ensure clarity and precision in communication.