The term MORE FOOLISH can be broken down into four crossword solutions: SILLIER (7 letters), INANER (6 letters), SAPPIER (7 letters), and DUMBER (6 letters). SILLIER is an adjective meaning 'more foolish or silly, ' while INANER is an adjective meaning 'more foolish or silly in a stupid way.' SAPPIER is an adjective meaning 'more foolish or silly in a silly way, ' and DUMBER is an adjective meaning 'more foolish or silly in a stupid way.' All of these words are used to describe someone or something that is more foolish than usual.