The word "fir-cone" generally refers to the protective covering surrounding the seeds of pine trees. However, there are several synonyms for this term. A common term used is "pinecone". This is a more general term that refers to the cone-shaped fruit of any pine tree. Another synonym is "conifer cone". This term is more specific as it refers to the cone structure of trees from the conifer family. Another synonym for fir-cone is "pine nut". This term refers to the edible seed found inside the fir-cone. Overall, synonyms for the term "fir-cone" allow for more specific and varied language in describing these natural structures.