capital vs majuscule

capital and majuscule both are nouns.

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

As adjectives, capital and majuscule are synonyms defined as:

Other synonyms of capital include great.

As nouns, capital and majuscule are synonyms defined as:

capital and majuscule: one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis

Other synonyms of capital include capital letter, upper-case letter, uppercase.

capital (noun)	majuscule (noun)
the upper part of a column that supports the entablature	one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis
one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis
a seat of government
a center that is associated more than any other with some activity or product
wealth in the form of money or property owned by a person or business and human resources of economic value
assets available for use in the production of further assets

capital (adjective)	majuscule (adjective)
of principal importance	of or relating to a style of writing characterized by somewhat rounded capital letters; 4th to 8th centuries
first-rate	uppercase
uppercase