superintendent vs overseer

superintendent and overseer both are nouns.

Word	Noun	Adjective	Verb	Adverb
superintendent	Yes	No	No	No
overseer	Yes	No	No	No

As nouns, superintendent and overseer are synonyms defined as:

superintendent and overseer: a person who directs and manages an organization

superintendent (noun)	overseer (noun)
a person who directs and manages an organization	a person who directs and manages an organization
a caretaker for an apartment house; represents the owner as janitor and rent collector