purism vs insistence

purism and insistence both are nouns.

Word	Noun	Adjective	Verb	Adverb
purism	Yes	No	No	No
insistence	Yes	No	No	No

As nouns, insistence is a hypernym of purism; that is, insistence is a word with a broader meaning than purism:

purism: scrupulous or exaggerated insistence on purity or correctness (especially in language)
insistence: continual and persistent demands

Other hypernyms of purism include insisting.

purism (noun)	insistence (noun)
scrupulous or exaggerated insistence on purity or correctness (especially in language)	the act of insisting on something
	continual and persistent demands
	the state of demanding notice or attention