Fibrous is a term used to describe materials that are made up of many thin, THREADLIKE strands. THREADLIKE (10 letters) is an adjective used to describe something that is thin and string-like in appearance. HAIRY (5 letters) is an adjective used to describe something that is covered in small, thin hairs. STRINGY (7 letters) is an adjective used to describe something that is made up of long, thin strands. ROPY (4 letters) is an adjective used to describe something that is thick and STRINGY in texture. All of these adjectives can be used to describe fibrous materials.