sealer vs functionary

sealer and functionary both are nouns.

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

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

Other hypernyms of sealer include official.

sealer (noun)	functionary (noun)
an official who affixes a seal to a document	a worker who holds or is invested with an office
a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)