quintessence vs nub

quintessence and nub both are nouns.

Word	Noun	Adjective	Verb	Adverb
quintessence	Yes	No	No	No
nub	Yes	No	No	No

As nouns, nub is a hypernym of quintessence; that is, nub is a word with a broader meaning than quintessence:

quintessence: the purest and most concentrated essence of something
nub: the choicest or most essential or most vital part of some idea or experience

quintessence (noun)	nub (noun)
the purest and most concentrated essence of something	the choicest or most essential or most vital part of some idea or experience
the most typical example or representative of a type	a small piece
the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies	a small lump or protuberance