sunglasses vs shades

sunglasses and shades both are nouns.

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

As nouns, sunglasses and shades are synonyms defined as:

sunglasses and shades: (plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun

Other synonyms of sunglasses include dark glasses.

sunglasses (noun)	shades (noun)
(plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun	(plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun
	(plural) something that reminds you of someone or something