Hello everyone, nice to welcome you on our site, this page even has Level 13 answers. I enjoy it =D
Level 13 - ONRVEGRO
The answer to this puzzle is:
Words: GROOVER, ORGONE, GONER, GENRO, ROGER, ROVEN, ERGO, GOON, GOER, ROVE, GORE, ERG, ROE, EON, REV, GEN, ENG, REG, NOG, ONO, ERR, VEG, NOR
Bonus words:
GROOVER, ORGONE, GONER, GENRO, ROGER, ROVEN, ERGO, GOON, GOER, ROVE, GORE, ERG, ROE, EON, REV, GEN, ENG, REG, NOG, ONO, ERR, VEG, NOR