Hello everyone, nice to welcome you on our site, this page even has Level 13 answers. I enjoy it =D
Level 13 - GRENITN
The answer to this puzzle is:
Words: RINGENT, TINNER, GINNER, ENGIRT, NITRE, TRINE, REIGN, NITER, RENIG, RENIN, TINE, TRIG, NITE, GENT, TERN, GRIT, GIEN, TIER, TING, GITE, GIRT, GIRN, ERG, NIT, GIN, NET, GET, TIN, TIE, INN, GIT, REG, IRE, RIG, GEN, ENG, TEN
Bonus words:
RINGENT, TINNER, GINNER, ENGIRT, NITRE, TRINE, REIGN, NITER, RENIG, RENIN, TINE, TRIG, NITE, GENT, TERN, GRIT, GIEN, TIER, TING, GITE, GIRT, GIRN, ERG, NIT, GIN, NET, GET, TIN, TIE, INN, GIT, REG, IRE, RIG, GEN, ENG, TEN