Un-successfulness refers to the lack of success or failure in achieving a particular goal or objective. There are several synonyms for this term, including unproductiveness, ineffectiveness, inefficiency, fruitlessness, barrenness, and futility. Unproductiveness suggests the absence of productivity, while ineffectiveness refers to a failure to produce the desired outcome. Inefficiency indicates a lack of effectiveness, and fruitlessness suggests a lack of positive results. Barrenness implies a lack of growth or progress, while futility refers to the pointlessness of an action or effort. Each of these synonyms highlights a different aspect of un-successfulness, and can be used to describe situations where success has not been achieved.