prototype vs imago

prototype and imago both are nouns.

Word	Noun	Adjective	Verb	Adverb
prototype	Yes	No	No	No
imago	Yes	No	No	No

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

prototype: a standard or typical example
imago: (psychoanalysis) an idealized image of someone (usually a parent) formed in childhood

Other hyponyms of prototype include concentrate.

prototype (noun)	imago (noun)
a standard or typical example	an adult insect produced after metamorphosis
	(psychoanalysis) an idealized image of someone (usually a parent) formed in childhood