reminder vs shades

reminder and shades both are nouns.

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

As nouns, shades is a hyponym of reminder; that is, shades is a word with a more specific, narrower meaning than reminder:

Other hyponyms of reminder include deja vu, memento, souvenir, memento mori.

reminder (noun)	shades (noun)
an experience that causes you to remember something	(plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun
a message that helps you remember something	(plural) something that reminds you of someone or something
someone who gives a warning so that a mistake can be avoided