sustenance vs resource

sustenance and resource both are nouns.

Word	Noun	Adjective	Verb	Adverb
sustenance	Yes	No	No	No
resource	Yes	No	No	No

As nouns, resource is a hypernym of sustenance; that is, resource is a word with a broader meaning than sustenance:

sustenance: the financial means whereby one lives
resource: available source of wealth; a new or reserve supply that can be drawn upon when needed

sustenance (noun)	resource (noun)
the act of sustaining life by food or providing a means of subsistence	a source of aid or support that may be drawn upon when needed
a source of materials to nourish the body	the ability to deal resourcefully with unusual problems
the financial means whereby one lives	available source of wealth; a new or reserve supply that can be drawn upon when needed