Well dang. I write a lot, so I have a preponderance of favorite words. There's "bismuth," my favorite metal, and "titanium," my second favorite. Then there's "tamahagane," which means "jewel steel" in Japanese. Others include "illumined," "glyph," "flintlock," "calligraphy," "extraneous," "crimson," "azure," and "molten," just to name a few.