Flannels are a type of fabric that is commonly known for its softness, warmth, and durability. Generally made of wool, flannels are often used for shirts, trousers, and blankets. However, there are several synonyms that can be used in place of the word flannel. For instance, the word "plaid" can be used to describe a woolen fabric that is often used for clothing and home decor. Additionally, the term "tartan" refers to a specific kind of plaid that is associated with Scottish clans. Another synonym for flannel is "brushed cotton", which has a similar texture and appearance but is made of cotton instead of wool.