loan office vs business office

loan office and business office both are nouns.

Word	Noun	Adjective	Verb	Adverb
loan office	Yes	No	No	No
business office	Yes	No	No	No

As nouns, business office is a hypernym of loan office; that is, business office is a word with a broader meaning than loan office:

loan office: an office where loans are negotiated and repaid
business office: place of business where professional or clerical duties are performed

Other hypernyms of loan office include office.

loan office (noun)	business office (noun)
an office where loans are negotiated and repaid	place of business where professional or clerical duties are performed
a shop where loans are made with personal property as security