dearest vs deary

dearest and deary both are nouns.

Word	Noun	Adjective	Verb	Adverb
dearest	Yes	No	No	No
deary	Yes	No	No	No

As nouns, dearest and deary are synonyms defined as:

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

dearest (noun)	deary (noun)
a beloved person; used as terms of endearment	a special loved one
	a beloved person; used as terms of endearment