Hello everyone, nice to welcome you on our site, this page even has Level 13 answers. I enjoy it =D
Level 13 - NPAOISS
The answer to this puzzle is:
Words: OPSINS, PIANOS, PSOAI, OSSIA, PINAS, PSOAS, SAINS, SOAPS, SPINS, SPANS, PIONS, SNAPS, PISOS, PAINS, SNIPS, APSIS, NIPAS, OPSIN, SASIN, PIANS, ASPIS, SIPS, SNIP, NIPS, POIS, SPAS, PINA, PIAN, SAPS, ANIS, SAIN, PION, NAPS, APOS, SOAP, PAIN, PANS, SINS, SONS, ASPS, NIPA, SNAP, IONS, PINS, SANS, PISS, AINS, PISO, SON, PSI, SAP, PAN, SPA, ASS, SIN, ASP, SIS, PAS, POI, INS, NOS, NAP, OPS, NIP, SOP, ANI
Bonus words:
OPSINS, PIANOS, PSOAI, OSSIA, PINAS, PSOAS, SAINS, SOAPS, SPINS, SPANS, PIONS, SNAPS, PISOS, PAINS, SNIPS, APSIS, NIPAS, OPSIN, SASIN, PIANS, ASPIS, SIPS, SNIP, NIPS, POIS, SPAS, PINA, PIAN, SAPS, ANIS, SAIN, PION, NAPS, APOS, SOAP, PAIN, PANS, SINS, SONS, ASPS, NIPA, SNAP, IONS, PINS, SANS, PISS, AINS, PISO, SON, PSI, SAP, PAN, SPA, ASS, SIN, ASP, SIS, PAS, POI, INS, NOS, NAP, OPS, NIP, SOP, ANI