emblem vs cupid

emblem and cupid both are nouns.

Word	Noun	Adjective	Verb	Adverb
emblem	Yes	No	No	No
cupid	Yes	No	No	No

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

emblem: a visible symbol representing an abstract idea
cupid: a symbol for love in the form of a cherubic naked boy with wings and a bow and arrow

emblem (noun)	cupid (noun)
special design or visual object representing a quality, type, group, etc.	a symbol for love in the form of a cherubic naked boy with wings and a bow and arrow
a visible symbol representing an abstract idea