Hello everyone, nice to welcome you on our site, this page even has Level 15 answers. I enjoy it =D
Level 15 - RINETIH
The answer to this puzzle is:
Words: TINIER, HINTER, THEIN, TRINE, ITHER, NITER, NITRE, THINE, INTI, HERN, HENT, NITE, TERN, TINE, HEN, NET, TIN, THE, TIE, HIT, HER, NTH, HIE, NIT, IRE, TEN
Bonus words:
TINIER, HINTER, THEIN, TRINE, ITHER, NITER, NITRE, THINE, INTI, HERN, HENT, NITE, TERN, TINE, HEN, NET, TIN, THE, TIE, HIT, HER, NTH, HIE, NIT, IRE, TEN