sugar daddy vs sweetie

sugar daddy and sweetie both are nouns.

Word	Noun	Adjective	Verb	Adverb
sugar daddy	Yes	No	No	No
sweetie	Yes	No	No	No

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

sugar daddy: a wealthy older man who gives a young person expensive gifts in return for friendship or intimacy
sweetie: a person loved by another person

Other hypernyms of sugar daddy include steady, sweetheart, truelove.

sugar daddy (noun)	sweetie (noun)
a wealthy older man who gives a young person expensive gifts in return for friendship or intimacy	a person loved by another person
	a beloved person; used as terms of endearment