extensional vs logic

extensional is not a noun while logic is a noun.

Word	Noun	Adjective	Verb	Adverb
extensional	No	Yes	No	No
logic	Yes	No	No	No

extensional (noun)	logic (noun)
	the branch of philosophy that analyzes inference
	a system of reasoning
	reasoned and reasonable judgment
	the principles that guide reasoning within a given field or situation
	the system of operations performed by a computer that underlies the machine's representation of logical operations

extensional (adjective)	logic (adjective)
defining a word by listing the class of entities to which the word correctly applies