austere vs nonindulgent

austere and nonindulgent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
austere	No	Yes	No	No
nonindulgent	No	Yes	No	No

austere (adjective)	nonindulgent (adjective)
practicing great self-denial	characterized by strictness, severity, or restraint
of a stern or strict bearing or demeanor; forbidding in aspect
severely simple