Hello everyone, nice to welcome you on our site, this page even has Level 21 answers. I enjoy it =D
Level 21 - RLYTCTIS
The answer to this puzzle is:
Words: YTTRIC, SLITTY, LYRIST, TIRLS, TRYST, STYLI, CRITS, SILTY, LYTIC, STILT, TILTS, TITS, CIST, SILT, CRIS, CYST, CRIT, TICS, TRY, STY, TIT, SLY, TIC, SIC, TIL, SIT, ITS
Bonus words:
YTTRIC, SLITTY, LYRIST, TIRLS, TRYST, STYLI, CRITS, SILTY, LYTIC, STILT, TILTS, TITS, CIST, SILT, CRIS, CYST, CRIT, TICS, TRY, STY, TIT, SLY, TIC, SIC, TIL, SIT, ITS