dulcinea vs sweetie

dulcinea and sweetie both are nouns.

Word	Noun	Adjective	Verb	Adverb
dulcinea	Yes	No	No	No
sweetie	Yes	No	No	No

As nouns, sweetie is a hypernym of dulcinea; that is, sweetie is a word with a broader meaning than dulcinea:

Other hypernyms of dulcinea include steady, sweetheart, truelove.

dulcinea (noun)	sweetie (noun)
a woman who is a man's sweetheart	a person loved by another person
	a beloved person; used as terms of endearment