Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - TTRSEEL
The answer to this puzzle is:
Words: SETTLER, TRESTLE, STERLET, SETTER, STREEL, TESTER, RETEST, SETTLE, RELETS, REELS, ESTER, TERSE, STELE, SLEET, TELES, RELET, TRETS, TEELS, REEST, LEETS, STERE, LEERS, SETT, LEET, RETE, REES, ERST, EELS, TEES, SERE, LEER, LEES, LEST, TRES, TELE, LES, SET, LET, EEL, TEL, TEE, SER, ERE, RES, LEE, SEE
Bonus words:
SETTLER, TRESTLE, STERLET, SETTER, STREEL, TESTER, RETEST, SETTLE, RELETS, REELS, ESTER, TERSE, STELE, SLEET, TELES, RELET, TRETS, TEELS, REEST, LEETS, STERE, LEERS, SETT, LEET, RETE, REES, ERST, EELS, TEES, SERE, LEER, LEES, LEST, TRES, TELE, LES, SET, LET, EEL, TEL, TEE, SER, ERE, RES, LEE, SEE