sustenance vs nutriment

sustenance and nutriment both are nouns.

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

As nouns, sustenance and nutriment are synonyms defined as:

Other synonyms of sustenance include aliment, alimentation, nourishment, nutrition, victuals.

sustenance (noun)	nutriment (noun)
the act of sustaining life by food or providing a means of subsistence	a source of materials to nourish the body
a source of materials to nourish the body
the financial means whereby one lives