diplomatic minister vs diplomat

diplomatic minister and diplomat both are nouns.

Word	Noun	Adjective	Verb	Adverb
diplomatic minister	Yes	No	No	No
diplomat	Yes	No	No	No

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

diplomatic minister: a diplomat representing one government to another; ranks below ambassador
diplomat: an official engaged in international negotiations

Other hypernyms of diplomatic minister include diplomatist.

diplomatic minister (noun)	diplomat (noun)
a diplomat representing one government to another; ranks below ambassador	an official engaged in international negotiations
	a person who deals tactfully with others