dear vs sweetie

dear and sweetie both are nouns.

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

As nouns, dear and sweetie are synonyms defined as:

Other synonyms of dear include baby, beloved, darling, dearest, dearie, deary, honey, love, sweetheart.

dear (noun)	sweetie (noun)
a beloved person; used as terms of endearment	a person loved by another person
a sweet innocent mild-mannered person (especially a child)	a beloved person; used as terms of endearment

dear (adjective)	sweetie (adjective)
with or in a close or intimate relationship
having a high price
dearly loved
sincerely earnest

dear (adverb)	sweetie (adverb)
at a great cost
with affection