hospitaller vs form of address

hospitaller and form of address both are nouns.

Word	Noun	Adjective	Verb	Adverb
hospitaller	Yes	No	No	No
form of address	Yes	No	No	No

As nouns, form of address is a hypernym of hospitaller; that is, form of address is a word with a broader meaning than hospitaller:

hospitaller: title of the member of any of several religious orders that cared for the sick in hospitals.
form of address: an identifying appellation signifying status or function: e.g. `Mr.' or `General'

Other hypernyms of hospitaller include title, title of respect.

hospitaller (noun)	form of address (noun)
title of the member of any of several religious orders that cared for the sick in hospitals.	an identifying appellation signifying status or function: e.g. `Mr.' or `General'