set phrase vs ruralism

set phrase and ruralism both are nouns.

Word	Noun	Adjective	Verb	Adverb
set phrase	Yes	No	No	No
ruralism	Yes	No	No	No

As nouns, ruralism is a hyponym of set phrase; that is, ruralism is a word with a more specific, narrower meaning than set phrase:

set phrase: an expression whose meanings cannot be inferred from the meanings of the words that make it up
ruralism: a rural idiom or expression

Other hyponyms of set phrase include rusticism.

set phrase (noun)	ruralism (noun)
an expression whose meanings cannot be inferred from the meanings of the words that make it up	a rural characteristic or trait
	a rural idiom or expression
	Advocacy of rural life instead of urbanism or city living.