"Fire-new" is a phrase that refers to something new and fresh, as though it were just taken out of the fire. However, there are many other words that convey the same sense of newness, and can be used as synonyms for "fire-new". Some of these words include "brand-new", "untouched", "virgin", "unspoiled", "unused", and "mint". These words can be used to describe anything new, such as clothing, technology, or even ideas. Using a synonym for "fire-new" can enhance the richness and variety of your vocabulary and make your writing or speech more interesting and engaging.