quiddity vs haecceity

quiddity and haecceity both are nouns.

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

As nouns, quiddity and haecceity are synonyms defined as:

quiddity and haecceity: the essence that makes something the kind of thing it is and makes it different from any other

quiddity (noun)	haecceity (noun)
the essence that makes something the kind of thing it is and makes it different from any other	the essence that makes something the kind of thing it is and makes it different from any other
an evasion of the point of an argument by raising irrelevant distinctions or objections