haecceity vs nub

haecceity and nub both are nouns.

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

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

haecceity: the essence that makes something the kind of thing it is and makes it different from any other
nub: the choicest or most essential or most vital part of some idea or experience

haecceity (noun)	nub (noun)
the essence that makes something the kind of thing it is and makes it different from any other	the choicest or most essential or most vital part of some idea or experience
	a small piece
	a small lump or protuberance