Hello everyone, nice to welcome you on our site, this page even has Level 4 answers. I enjoy it =D
Level 4 - OANTNIC
The answer to this puzzle is:
Words: ACTINON, TANNIC, ATONIC, ANOINT, CATION, INCANT, CANNOT, ONTIC, CANTO, ACTIN, NITON, OCTAN, ANION, ANCON, COTAN, CONIN, ANON, NOTA, TAIN, IOTA, CAIN, CONI, CION, ICON, INTO, CONN, NONA, CANT, OTIC, CIAO, OAT, NOT, COT, ACT, ANT, TAN, CAT, TIN, CON, TON, NIT, CAN, TIC, NAN, INN, ION, ANI
Bonus words:
ACTINON, TANNIC, ATONIC, ANOINT, CATION, INCANT, CANNOT, ONTIC, CANTO, ACTIN, NITON, OCTAN, ANION, ANCON, COTAN, CONIN, ANON, NOTA, TAIN, IOTA, CAIN, CONI, CION, ICON, INTO, CONN, NONA, CANT, OTIC, CIAO, OAT, NOT, COT, ACT, ANT, TAN, CAT, TIN, CON, TON, NIT, CAN, TIC, NAN, INN, ION, ANI