physician vs John L. H. Down

physician and John L. H. Down both are nouns.

Word	Noun	Adjective	Verb	Adverb
physician	Yes	No	No	No
John L. H. Down	Yes	No	No	No

physician (noun)	John L. H. Down (noun)
a licensed medical practitioner	English physician who first described Down's syndrome (1828-1896)