Nonets are a type of poetic form consisting of nine lines. The term 'nonets' is derived from the Latin word for nine, 'novem'. The two crossword solutions, ENNEADS and nines, both refer to this same concept. ENNEADS is a seven-letter word derived from the Greek word for nine, 'ennea', while nines is a five-letter word that simply refers to the number nine. Both words can be used to describe the poetic form of nonets.