spectacles vs glasses

spectacles and glasses both are nouns.

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

As nouns, spectacles and glasses are synonyms defined as:

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

Other synonyms of spectacles include eyeglasses, specs.

spectacles (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