sunglasses vs glasses

sunglasses and glasses both are nouns.

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

As nouns, glasses is a hypernym of sunglasses; that is, glasses is a word with a broader meaning than sunglasses:

sunglasses: (plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun
glasses: (plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

Other hypernyms of sunglasses include eyeglasses, specs, spectacles.

sunglasses (noun)	glasses (noun)
(plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun	(plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision