glasses vs spectacles

glasses and spectacles both are nouns.

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

As nouns, glasses and spectacles are synonyms defined as:

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

Other synonyms of glasses include eyeglasses, specs.

glasses (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