shades vs dark glasses

shades and dark glasses both are nouns.

Word	Noun	Adjective	Verb	Adverb
shades	Yes	No	No	No
dark glasses	Yes	No	No	No

As nouns, shades and dark glasses are synonyms defined as:

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

Other synonyms of shades include sunglasses.

shades (noun)	dark glasses (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