hangover vs functionary

hangover and functionary both are nouns.

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

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

Other hypernyms of hangover include official.

hangover (noun)	functionary (noun)
something that has survived from the past	a worker who holds or is invested with an office
an official who remains in office after his term
disagreeable aftereffects from the use of drugs (especially alcohol)