glass fibre vs optical fiber

glass fibre and optical fiber both are nouns.

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

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

glass fibre and optical fiber: 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 fibre.

glass fibre (noun)	optical fiber (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