fare-thee-well vs perfection

fare-thee-well and perfection both are nouns.

Word	Noun	Adjective	Verb	Adverb
fare-thee-well	Yes	No	No	No
perfection	Yes	No	No	No

As nouns, perfection is a hypernym of fare-thee-well; that is, perfection is a word with a broader meaning than fare-thee-well:

Other hypernyms of fare-thee-well include flawlessness, ne plus ultra.

fare-thee-well (noun)	perfection (noun)
state of perfection; the utmost degree	the act of making something perfect
	an ideal instance; a perfect embodiment of a concept
	the state of being without a flaw or defect