majuscular vs majuscule

majuscular is not a noun while majuscule is a noun.

Word	Noun	Adjective	Verb	Adverb
majuscular	No	Yes	No	No
majuscule	Yes	Yes	No	No

majuscular (noun)	majuscule (noun)
	one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis

majuscular (adjective)	majuscule (adjective)
of the nature of a majuscule or written in majuscules	of or relating to a style of writing characterized by somewhat rounded capital letters; 4th to 8th centuries
	uppercase