Hello everyone, nice to welcome you on our site, this page even has Level 11 answers. I enjoy it =D
Level 11 - OIRUNFM
The answer to this puzzle is:
Words: ONIUM, MUNI, NORI, FIRN, FOIN, INRO, MORN, FINO, MUON, NOIR, ROM, NOM, URN, RIM, OUR, FIN, NOR, MOR, MON, ION, FRO, FIR, FUR
Bonus words:
ONIUM, MUNI, NORI, FIRN, FOIN, INRO, MORN, FINO, MUON, NOIR, ROM, NOM, URN, RIM, OUR, FIN, NOR, MOR, MON, ION, FRO, FIR, FUR