purism vs insisting

purism and insisting both are nouns.

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

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

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

Other hypernyms of purism include insistence.

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