pastoral vs rural

pastoral is a noun but rural is not a noun.

Word	Noun	Adjective	Verb	Adverb
pastoral	Yes	Yes	No	No
rural	No	Yes	No	No

pastoral (noun)	rural (noun)
a musical composition that evokes rural life
a literary work idealizing the rural life (especially the life of shepherds)
a letter from a pastor to the congregation

pastoral (adjective)	rural (adjective)
of or relating to a pastor	of or relating to the countryside as opposed to the city; living in or characteristic of farming or country life; living in or characteristic of farming or country life
relating to shepherds or herdsmen or devoted to raising sheep or cattle
(used with regard to idealized country life) idyllically rustic