cupid vs allegory

cupid and allegory both are nouns.

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

As nouns, allegory is a hypernym of cupid; that is, allegory is a word with a broader meaning than cupid:

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

Other hypernyms of cupid include emblem.

cupid (noun)	allegory (noun)
a symbol for love in the form of a cherubic naked boy with wings and a bow and arrow	a short moral story (often with animal characters)
	an expressive style that uses fictional characters and events to describe some subject by suggestive resemblances; an extended metaphor
	a visible symbol representing an abstract idea