spectacles vs eyeglasses

spectacles and eyeglasses both are nouns.

Word	Noun	Adjective	Verb	Adverb
spectacles	Yes	No	No	No
eyeglasses	Yes	No	No	No

As nouns, spectacles and eyeglasses are synonyms defined as:

spectacles and eyeglasses: (plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

Other synonyms of spectacles include glasses, specs.

spectacles (noun)	eyeglasses (noun)
(plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision	(plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision