sincere vs dear

sincere is not a noun while dear is a noun.

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

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

sincere (adjective)	dear (adjective)
open and genuine; not deceitful	with or in a close or intimate relationship
characterized by a firm and humorless belief in the validity of your opinions	having a high price
	dearly loved
	sincerely earnest

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