Gabardines are a type of heavy-duty, durable fabric commonly used in outerwear. There are a variety of synonyms for the word gabardine, including twill, drill, khaki, and canvas. Twill is similar to gabardine in its weave pattern, while drill has a slightly rougher texture. Khaki refers to a specific color of gabardine, and can also be used to describe any similar fabric in that color. Canvas is a versatile material that shares gabardine's durability, but is typically lighter in weight. Other possible synonyms for gabardine include herringbone, serge, and moleskin, each with their own unique characteristics and uses.