unclothe vs undress

unclothe is not a noun while undress is a noun.

Word	Noun	Adjective	Verb	Adverb
unclothe	No	No	Yes	No
undress	Yes	No	Yes	No

As verbs, unclothe and undress are synonyms defined as:

Other synonyms of unclothe include discase, disrobe, peel, strip, strip down, uncase.

unclothe (noun)	undress (noun)
	partial or complete nakedness

unclothe (verb)	undress (verb)
get undressed	get undressed
take the covers off	remove (someone's or one's own) clothes
strip