Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - ITREAW
The answer to this puzzle is:
Words: TWIER, IRATE, TAWIE, TAWER, RETIA, TERAI, AIRT, WERT, WIRE, WAIR, WRIT, WEIR, WART, WARE, TARE, RITE, ARE, TAR, IRE, ETA, AWE, AIR, EAT, ATE, WAR, TIE
Bonus words:
TWIER, IRATE, TAWIE, TAWER, RETIA, TERAI, AIRT, WERT, WIRE, WAIR, WRIT, WEIR, WART, WARE, TARE, RITE, ARE, TAR, IRE, ETA, AWE, AIR, EAT, ATE, WAR, TIE