minuscular vs lowercase

minuscular is not a noun while lowercase is a noun.

Word	Noun	Adjective	Verb	Adverb
minuscular	No	Yes	No	No
lowercase	Yes	Yes	No	No

minuscular (noun)	lowercase (noun)
	the characters that were once kept in bottom half of a compositor's type case

minuscular (adjective)	lowercase (adjective)
of or relating to a small cursive script developed from uncial; 7th to 9th centuries	relating to small (not capitalized) letters that were kept in the lower half of a compositor's type case