Hello everyone, nice to welcome you on our site, this page even has Level 14 answers. I enjoy it =D
Level 14 - GSIIMSN
The answer to this puzzle is:
Words: MINIS, ISMS, GINS, NISI, MIGS, SIMS, SINS, SIM, SIS, INS, GIN, SIN
Bonus words:
MINIS, ISMS, GINS, NISI, MIGS, SIMS, SINS, SIM, SIS, INS, GIN, SIN