optical fiber vs glass fibre

optical fiber and glass fibre both are nouns.

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

As nouns, optical fiber and glass fibre are synonyms defined as:

optical fiber and glass fibre: a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images

Other synonyms of optical fiber include glass fiber, optical fibre.

optical fiber (noun)	glass fibre (noun)
a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images	a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images