fiber - noun

a slender and greatly elongated substance capable of being spun into yarn

coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis

any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)

the inherent complex of attributes that determines a persons moral and ethical actions and reactions

a leatherlike material made by compressing layers of paper or cloth

fiber - thesaurus

character   fibre   roughage