Hello everyone, nice to welcome you on our site, this page even has Level 21 answers. I enjoy it =D
Level 21 - PSSIITR
The answer to this puzzle is:
Words: SPRITS, STRIPS, SPIRTS, STIRPS, TIPIS, SPRIT, SPIRT, PRISS, SPITS, STIRP, STIRS, PITS, SITS, IRIS, TIPS, RIPS, PSST, SIPS, TIPI, SIRS, PSI, ITS, SIS
Bonus words:
SPRITS, STRIPS, SPIRTS, STIRPS, TIPIS, SPRIT, SPIRT, PRISS, SPITS, STIRP, STIRS, PITS, SITS, IRIS, TIPS, RIPS, PSST, SIPS, TIPI, SIRS, PSI, ITS, SIS