physicist vs Prokhorov

physicist and Prokhorov both are nouns.

Word	Noun	Adjective	Verb	Adverb
physicist	Yes	No	No	No
Prokhorov	Yes	No	No	No

physicist (noun)	Prokhorov (noun)
a scientist trained in physics	Russian physicist whose research into ways of moving electrons around atoms led to the development of masers and lasers for producing high-intensity radiation (1916-2002)