Entering wedge is a term used to refer to something that is used to start a process or create a change. However, there are various synonyms to the term "entering wedge" that can be used interchangeably when expressing the same idea. These synonyms include "opening gambit," "foot in the door," "leverage," "starting point," "pretext," "inroad," "beginning step," and "springboard." Each of these synonyms implies a starting point for something bigger, a catalyst for change or progress. Therefore, when seeking to express the idea of an entering wedge, any of these synonyms can be used effectively to convey the same meaning.