5 letters · 10 points in Scrabble
noun a slender and greatly elongated substance capable of being spun into yarn
noun coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis
noun any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)
originFrom French fibre, from Old French fibre, from Latin fibra.
Etymology from Wiktionary, CC BY-SA 3.0