Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - NORIMFG
The answer to this puzzle is:
Words: GIRON, GONIF, NORI, MORN, FRIG, GIRO, FIRN, GIRN, FOIN, INRO, FINO, GORM, NOIR, RIG, NOM, MON, ION, NOR, FIG, FIN, FIR, MOR, NOG, FRO, ROM, RIM, FOG, GIN
Bonus words:
GIRON, GONIF, NORI, MORN, FRIG, GIRO, FIRN, GIRN, FOIN, INRO, FINO, GORM, NOIR, RIG, NOM, MON, ION, NOR, FIG, FIN, FIR, MOR, NOG, FRO, ROM, RIM, FOG, GIN