eyeglasses vs spectacles

eyeglasses and spectacles both are nouns.

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

As nouns, eyeglasses and spectacles are synonyms defined as:

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

Other synonyms of eyeglasses include glasses, specs.

eyeglasses (noun)	spectacles (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