Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - ISETLF
The answer to this puzzle is:
Words: STIFLE, FLIEST, FILETS, FLITES, TILES, FELTS, LEFTS, FLITS, ISLET, ISTLE, FEIST, FLITE, FILET, STILE, LIFTS, EFTS, LEIS, FETS, LETS, FITS, TIES, LIES, SLIT, SILT, SIFT, LITE, LIEF, LEST, FLIT, FILS, FEST, FELT, LIE, TIE, FIT, ELF, TIL, LES, TEL, LEI, ITS, FIE, SIT
Bonus words:
STIFLE, FLIEST, FILETS, FLITES, TILES, FELTS, LEFTS, FLITS, ISLET, ISTLE, FEIST, FLITE, FILET, STILE, LIFTS, EFTS, LEIS, FETS, LETS, FITS, TIES, LIES, SLIT, SILT, SIFT, LITE, LIEF, LEST, FLIT, FILS, FEST, FELT, LIE, TIE, FIT, ELF, TIL, LES, TEL, LEI, ITS, FIE, SIT