painter vs John Copley

painter and John Copley both are nouns.

Word	Noun	Adjective	Verb	Adverb
painter	Yes	No	No	No
John Copley	Yes	No	No	No

painter (noun)	John Copley (noun)
large American feline resembling a lion	American painter who did portraits of Paul Revere and John Hancock before fleeing to England to avoid the American Revolution (1738-1815)
a line that is attached to the bow of a boat and used for tying up (as when docking or towing)
an artist who paints
a worker who is employed to cover objects with paint