Agalloch is a word that has deep roots in ancient Greek language and mythology. It refers to a type of wood that is commonly used in the creation of wooden doors, tables, and other types of furniture. However, there are other terms and phrases that can be used as synonyms for this unique wood. For example, the term "billot" is often used to describe similarly-styled wood pieces that are carved and shaped in a similar fashion. Other potential synonyms include "oak," "cedar," "mahogany," and even "teak." Ultimately, the specific term used will depend on the context of the conversation and individual preferences of the speaker.