self-preservation vs saving

self-preservation and saving both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-preservation	Yes	No	No	No
saving	Yes	Yes	No	No

As nouns, saving is a hypernym of self-preservation; that is, saving is a word with a broader meaning than self-preservation:

self-preservation: preservation of yourself from harm; a natural or instinctive tendency
saving: the activity of protecting something from loss or danger

Other hypernyms of self-preservation include preservation.

self-preservation (noun)	saving (noun)
preservation of yourself from harm; a natural or instinctive tendency	an act of economizing; reduction in cost
	the activity of protecting something from loss or danger
	recovery or preservation from loss or danger

self-preservation (adjective)	saving (adjective)
	bringing about salvation or redemption from sin
	characterized by thriftiness