sweetheart vs beauty

sweetheart and beauty both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweetheart	Yes	Yes	No	No
beauty	Yes	No	No	No

As nouns, sweetheart and beauty are synonyms defined as:

Other synonyms of sweetheart include dish, knockout, looker, lulu, mantrap, peach, ravisher, smasher, stunner.

sweetheart (noun)	beauty (noun)
a person loved by another person	the qualities that give pleasure to the senses
a very attractive or seductive looking woman	an outstanding example of its kind
any well-liked individual	a very attractive or seductive looking woman
a beloved person; used as terms of endearment

sweetheart (adjective)	beauty (adjective)
privileged treatment of a favored person or corporation (sometimes unethically)