Hello everyone, nice to welcome you on our site, this page even has Level 13 answers. I enjoy it =D
Level 13 - SNIGTSR
The answer to this puzzle is:
Words: GRISTS, STINGS, GRITS, GIRTS, GIRNS, GRINS, GISTS, STIRS, GRIST, TINGS, TRIGS, SNITS, SITS, SIRS, SINS, RINS, RIGS, NITS, TINS, SIGN, GITS, GIST, GINS, TRIG, TING, SNIT, GIRN, GIRT, GRIT, SIR, SIT, ITS, GIT, INS, NIT, SIS, GIN
Bonus words:
GRISTS, STINGS, GRITS, GIRTS, GIRNS, GRINS, GISTS, STIRS, GRIST, TINGS, TRIGS, SNITS, SITS, SIRS, SINS, RINS, RIGS, NITS, TINS, SIGN, GITS, GIST, GINS, TRIG, TING, SNIT, GIRN, GIRT, GRIT, SIR, SIT, ITS, GIT, INS, NIT, SIS, GIN