Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - OIGUNRT
The answer to this puzzle is:
Words: OUTRING, OUTGRIN, ROUTING, OUTING, OUTRIG, TURION, UNGIRT, TRIGON, TRUING, GIRON, TIGON, RUING, NITRO, TRIGO, RUTIN, INGOT, GUIRO, GRUNT, GROUT, GRIOT, UNGOT, UNRIG, TORI, TRIG, TONG, TIRO, TRIO, TRUG, TING, UNTO, TORN, RUNT, GIRN, INRO, GIRO, GIRT, GOUT, GRIT, GROT, INTO, RUNG, NOIR, NORI, RIOT, ROTI, ROUT, TUNG, URN, RUN, GIN, TUN, TUG, TOR, RUT, ROT, OUR, NOT, NOR, NOG, NIT, ION, GOT, GNU, GIT, GUN
Bonus words:
OUTRING, OUTGRIN, ROUTING, OUTING, OUTRIG, TURION, UNGIRT, TRIGON, TRUING, GIRON, TIGON, RUING, NITRO, TRIGO, RUTIN, INGOT, GUIRO, GRUNT, GROUT, GRIOT, UNGOT, UNRIG, TORI, TRIG, TONG, TIRO, TRIO, TRUG, TING, UNTO, TORN, RUNT, GIRN, INRO, GIRO, GIRT, GOUT, GRIT, GROT, INTO, RUNG, NOIR, NORI, RIOT, ROTI, ROUT, TUNG, URN, RUN, GIN, TUN, TUG, TOR, RUT, ROT, OUR, NOT, NOR, NOG, NIT, ION, GOT, GNU, GIT, GUN