Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - RNDFEI
The answer to this puzzle is:
Words: REDFIN, REFIND, INFER, FINED, FINER, NERD, FEND, REIN, RIFE, DEFI, FIRN, FERN, FIND, DENI, DIRE, FINE, RIND, FER, FEN, FIE, FIR, REF, DIE, DEN, END, FED, DIN, IRE, RED, FIN, RID, DEF
Bonus words:
REDFIN, REFIND, INFER, FINED, FINER, NERD, FEND, REIN, RIFE, DEFI, FIRN, FERN, FIND, DENI, DIRE, FINE, RIND, FER, FEN, FIE, FIR, REF, DIE, DEN, END, FED, DIN, IRE, RED, FIN, RID, DEF