church service vs discourse

church service and discourse both are nouns.

Word	Noun	Adjective	Verb	Adverb
church service	Yes	No	No	No
discourse	Yes	No	Yes	No

church service (noun)	discourse (noun)
a service conducted in a house of worship	an extended communication (often interactive) dealing with some particular topic
	extended verbal expression in speech or writing
	an address of a religious nature (usually delivered during a church service)

church service (verb)	discourse (verb)
	talk at length and formally about a topic
	carry on a conversation
	to consider or examine in speech or writing