The word "hefter" has several synonyms depending on the context in which it is used. In terms of a person, "hefter" could be replaced with "binder," "clasper," or "fastener." For a tool or instrument, "hefter" can be interchanged with "stapler" or "stitcher." In the context of a book or document, "hefter" can be replaced with "binder," "folder," or "envelope." Additionally, "hefter" can also be used to describe the act of binding or combining materials, for which synonyms include "attaching," "uniting," or "connecting." Regardless of the specific synonym used, all share the same purpose of bringing disparate materials together in a cohesive manner.