Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - EVNRETU
The answer to this puzzle is:
Words: RETUNE, NEUTER, VENTER, VERTU, RENTE, EVERT, TREEN, REVET, ENURE, TERNE, TERN, RUNT, VEER, NEVE, RETE, VERT, TREE, TUNE, TEEN, RENT, EVEN, TRUE, VENT, TURN, ERNE, RUN, NUT, NET, TEE, URN, TUN, TEN, REV, VEE, ERE, RUE, VET, NEE, RUT, EVE
Bonus words:
RETUNE, NEUTER, VENTER, VERTU, RENTE, EVERT, TREEN, REVET, ENURE, TERNE, TERN, RUNT, VEER, NEVE, RETE, VERT, TREE, TUNE, TEEN, RENT, EVEN, TRUE, VENT, TURN, ERNE, RUN, NUT, NET, TEE, URN, TUN, TEN, REV, VEE, ERE, RUE, VET, NEE, RUT, EVE