diplomatist vs functionary

diplomatist and functionary both are nouns.

Word	Noun	Adjective	Verb	Adverb
diplomatist	Yes	No	No	No
functionary	Yes	No	No	No

As nouns, functionary is a hypernym of diplomatist; that is, functionary is a word with a broader meaning than diplomatist:

Other hypernyms of diplomatist include official.

diplomatist (noun)	functionary (noun)
an official engaged in international negotiations	a worker who holds or is invested with an office