eyeglasses vs glasses

eyeglasses and glasses both are nouns.

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

As nouns, eyeglasses and glasses are synonyms defined as:

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

Other synonyms of eyeglasses include specs, spectacles.

eyeglasses (noun)	glasses (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