An invented word, also known as a neologism, is a newly coined term that has not been used before. The two crossword solutions for this term are 'COINAGE' and 'SINGLETON'. COINAGE is a noun that refers to the act of creating or inventing a new word or phrase. SINGLETON is a noun that describes a word or phrase that is used only once in a particular context. Both of these terms are related to the concept of an invented word, as they both refer to the creation of something new.