Upper case is a term used to describe the capitalization of letters in written language. The two crossword solutions for this term are 'CAPITAL' (7 letters) and 'CAPS' (4 letters). 'CAPITAL' refers to the large, upper-case letters used at the beginning of sentences or proper nouns, while 'CAPS' is an abbreviation for the phrase 'all caps, ' which is used to describe text that is entirely composed of CAPITAL letters.