economize vs economy

economize is not a noun while economy is a noun.

Word	Noun	Adjective	Verb	Adverb
economize	No	No	Yes	No
economy	Yes	No	No	No

economize (noun)	economy (noun)
	an act of economizing; reduction in cost
	frugality in the expenditure of money or resources
	the efficient use of resources
	the system of production and distribution and consumption

economize (verb)	economy (verb)
use cautiously and frugally
spend sparingly, avoid the waste of