Hello everyone, nice to welcome you on our site, this page even has Level 15 answers. I enjoy it =D
Level 15 - IRASBBT
The answer to this puzzle is:
Words: TABBIS, RABBIS, RABBI, SABIR, BRITS, BRATS, BARBS, BAITS, ABRIS, STRIA, SITAR, TARSI, AIRTS, ASTIR, TARS, RATS, RIBS, RIAS, BARB, BAST, BRAS, BITS, BIBS, BARS, BATS, ARTS, ARBS, AITS, AIRT, AIRS, ABRI, TSAR, TABS, BRAT, STAB, BRIS, BRIT, SARI, ART, BIT, BAR, TAB, SIR, ABS, TAR, SIB, SAT, ITS, BIS, BIB, ARB, RAT
Bonus words:
TABBIS, RABBIS, RABBI, SABIR, BRITS, BRATS, BARBS, BAITS, ABRIS, STRIA, SITAR, TARSI, AIRTS, ASTIR, TARS, RATS, RIBS, RIAS, BARB, BAST, BRAS, BITS, BIBS, BARS, BATS, ARTS, ARBS, AITS, AIRT, AIRS, ABRI, TSAR, TABS, BRAT, STAB, BRIS, BRIT, SARI, ART, BIT, BAR, TAB, SIR, ABS, TAR, SIB, SAT, ITS, BIS, BIB, ARB, RAT