allegory vs cupid

allegory and cupid both are nouns.

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

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

allegory: 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

allegory (noun)	cupid (noun)
a short moral story (often with animal characters)	a symbol for love in the form of a cherubic naked boy with wings and a bow and arrow
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