Kennan vs diplomat

Kennan and diplomat both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kennan	Yes	No	No	No
diplomat	Yes	No	No	No

As nouns, diplomat is a hypernym of Kennan; that is, diplomat is a word with a broader meaning than Kennan:

Kennan: United States diplomat who recommended a policy of containment in dealing with Soviet aggression (1904-2005)
diplomat: an official engaged in international negotiations

Other hypernyms of Kennan include diplomatist.

Kennan (noun)	diplomat (noun)
United States diplomat who recommended a policy of containment in dealing with Soviet aggression (1904-2005)	an official engaged in international negotiations
	a person who deals tactfully with others