perfection vs ne plus ultra

perfection and ne plus ultra both are nouns.

Word	Noun	Adjective	Verb	Adverb
perfection	Yes	No	No	No
ne plus ultra	Yes	No	No	No

As nouns, perfection and ne plus ultra are synonyms defined as:

perfection and ne plus ultra: the state of being without a flaw or defect

Other synonyms of perfection include flawlessness.

perfection (noun)	ne plus ultra (noun)
the act of making something perfect	the state of being without a flaw or defect
an ideal instance; a perfect embodiment of a concept
the state of being without a flaw or defect