austere vs stark

austere and stark both are adjectives.

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

As adjectives, austere and stark are synonyms defined as:

Other synonyms of austere include severe, stern.

austere (adjective)	stark (adjective)
practicing great self-denial	complete or extreme
of a stern or strict bearing or demeanor; forbidding in aspect	providing no shelter or sustenance
severely simple	severely simple
	devoid of any qualifications or disguise or adornment
	without qualification; used informally as (often pejorative) intensifiers

austere (adverb)	stark (adverb)
	to the fullest degree