economy of scale vs saving

economy of scale and saving both are nouns.

Word	Noun	Adjective	Verb	Adverb
economy of scale	Yes	No	No	No
saving	Yes	Yes	No	No

As nouns, saving is a hypernym of economy of scale; that is, saving is a word with a broader meaning than economy of scale:

economy of scale: the saving in cost of production that is due to mass production
saving: an act of economizing; reduction in cost

Other hypernyms of economy of scale include economy.

economy of scale (noun)	saving (noun)
the saving in cost of production that is due to mass production	an act of economizing; reduction in cost
	the activity of protecting something from loss or danger
	recovery or preservation from loss or danger

economy of scale (adjective)	saving (adjective)
	bringing about salvation or redemption from sin
	characterized by thriftiness