glass fibre vs optical fibre

glass fibre and optical fibre both are nouns.

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

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

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

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

glass fibre (noun)	optical 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