Hello everyone, nice to welcome you on our site, this page even has Level 13 answers. I enjoy it =D
Level 13 - EPERMRI
The answer to this puzzle is:
Words: EPIMER, PREMIE, MERER, RIMER, PRIER, RIPER, MERE, PERE, PERI, PERM, RIME, PRIM, RIPE, EMIR, PIER, PEER, ERR, ERE, IRE, RIM, REP, REM, PEE, RIP, PER
Bonus words:
EPIMER, PREMIE, MERER, RIMER, PRIER, RIPER, MERE, PERE, PERI, PERM, RIME, PRIM, RIPE, EMIR, PIER, PEER, ERR, ERE, IRE, RIM, REP, REM, PEE, RIP, PER