au naturel vs bare

au naturel and bare both are adjectives.

Word	Noun	Adjective	Verb	Adverb
au naturel	No	Yes	No	No
bare	No	Yes	Yes	No

As adjectives, au naturel and bare are synonyms defined as:

Other synonyms of au naturel include naked, nude.

au naturel (adjective)	bare (adjective)
having no clothes on the body	lacking its natural or customary covering
	not having a protective covering
	having everything extraneous removed including contents
	providing no shelter or sustenance
	lacking in magnitude or quantity
	just barely adequate or within a lower limit
	apart from anything else; without additions or modifications
	lacking embellishment or ornamentation
	having no clothes on the body
	lacking a surface finish such as paint