proper name vs proper noun

proper name and proper noun both are nouns.

Word	Noun	Adjective	Verb	Adverb
proper name	Yes	No	No	No
proper noun	Yes	No	No	No

As nouns, proper name and proper noun are synonyms defined as:

proper name and proper noun: a noun that denotes a particular thing; usually capitalized

proper name (noun)	proper noun (noun)
a noun that denotes a particular thing; usually capitalized	a noun that denotes a particular thing; usually capitalized