immaculacy vs flawlessness

immaculacy and flawlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
immaculacy	Yes	No	No	No
flawlessness	Yes	No	No	No

As nouns, flawlessness is a hypernym of immaculacy; that is, flawlessness is a word with a broader meaning than immaculacy:

immaculacy: The characteristic of having no stain or blemish; of being spotless, undefiled, clear, pure.
flawlessness: the state of being without a flaw or defect

Other hypernyms of immaculacy include ne plus ultra, perfection.

immaculacy (noun)	flawlessness (noun)
The characteristic of having no stain or blemish; of being spotless, undefiled, clear, pure.	the state of being without a flaw or defect