Hello everyone, nice to welcome you on our site, this page even has Level 15 answers. I enjoy it =D
Level 15 - IEPAPDNX
The answer to this puzzle is:
Words: APPEND, NAPPIE, NIPPED, NAPPED, PAINED, NIXED, XENIA, PIPED, PANED, PINED, NAPPE, PIAN, NAPE, PADI, NEAP, NIPA, PINA, AXED, DENI, APED, PIED, PAID, AIDE, APEX, PAD, PAN, AXE, END, DEN, APP, AID, PEN, DIN, PIE, PIX, NAP, NIX, PAP, NIP, PEP, PIP, ANI, AND
Bonus words:
APPEND, NAPPIE, NIPPED, NAPPED, PAINED, NIXED, XENIA, PIPED, PANED, PINED, NAPPE, PIAN, NAPE, PADI, NEAP, NIPA, PINA, AXED, DENI, APED, PIED, PAID, AIDE, APEX, PAD, PAN, AXE, END, DEN, APP, AID, PEN, DIN, PIE, PIX, NAP, NIX, PAP, NIP, PEP, PIP, ANI, AND