fiber vs fibre

fiber and fibre both are nouns.

Word	Noun	Adjective	Verb	Adverb
fiber	Yes	No	No	No
fibre	Yes	No	No	No

As nouns, fiber and fibre are synonyms defined as:

fiber and fibre: a leatherlike material made by compressing layers of paper or cloth

Other synonyms of fiber include vulcanized fiber.

As nouns, fiber and fibre are synonyms defined as:

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

Other synonyms of fiber include character.

As nouns, fiber and fibre are synonyms defined as:

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

As nouns, fiber and fibre are synonyms defined as:

fiber and fibre: coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis

Other synonyms of fiber include roughage.

As nouns, fiber and fibre are synonyms defined as:

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

fiber (noun)	fibre (noun)
a leatherlike material made by compressing layers of paper or cloth	a leatherlike material made by compressing layers of paper or cloth
the inherent complex of attributes that determines a persons moral and ethical actions and reactions	the inherent complex of attributes that determines a persons moral and ethical actions and reactions
any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)	any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber)
coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis	coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis
a slender and greatly elongated substance capable of being spun into yarn	a slender and greatly elongated substance capable of being spun into yarn