Pine boxes are commonly associated with caskets or coffins made from pine wood. However, there are several synonyms for the term "pine boxes" that can be used in different contexts. One synonym for pine boxes is "pine caskets," which is a more formal and precise term. Another synonym for pine boxes is "pine coffins," which is a term that is more commonly used in Europe. Other synonyms for pine boxes include "wooden caskets," "wooden coffins," and "wooden boxes." These terms are often used interchangeably with pine boxes, depending on the level of formality and context of the conversation.