undress vs uncase

undress is a noun but uncase is not a noun.

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

As verbs, undress and uncase are synonyms defined as:

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

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

undress (verb)	uncase (verb)
get undressed	get undressed
remove (someone's or one's own) clothes