Hello everyone, nice to welcome you on our site, this page even has Level 12 answers. I enjoy it =D
Level 12 - IHOLSP
The answer to this puzzle is:
Words: POLIS, SOLI, HOPS, PISO, SLOP, LISP, POLS, POIS, POSH, HOLS, LIPS, HOLP, PISH, HIPS, OILS, LOPS, LOP, HIP, SOL, PHI, HOP, OIL, OPS, POL, PSI, POI, HIS, SOP, HOS
Bonus words:
POLIS, SOLI, HOPS, PISO, SLOP, LISP, POLS, POIS, POSH, HOLS, LIPS, HOLP, PISH, HIPS, OILS, LOPS, LOP, HIP, SOL, PHI, HOP, OIL, OPS, POL, PSI, POI, HIS, SOP, HOS