Heaper is a rare term used to describe something or someone that heaps or piles things together. Although not commonly used, there are several synonyms for heaper that can be used instead. For example, the words gatherer, collector, accumulater, and amasser can be used interchangeably, all referring to someone who tends to gather items in large quantities. Other synonyms include hoarder, packrat, and clutterbug, all implying a tendency to amass and hold onto things excessively. On the other hand, the word heap can be replaced with stack, pile, mound, or collection, all describing a large amount of something amassed together in one place.