* Novenary: a group of nine, or something relating to nine
* Novena: a nine-day period of prayer or devotion
* November: the ninth month of the year in the ancient Roman calendar (although now it is the eleventh)
It's worth noting that the "novem" prefix is not as common as some other Latin prefixes. You will likely see "non-" used instead (e.g., nonagon, nonet, nonuple).