Solutions :

3-letter words (1 point): 60

AIS; AIT; ARY; ATE; AYU; CIS; CIT; EST; ETA; ITA; ITS; NAS; NAT; NAY; NUR; NUS; RAI; RAN; RAS; RAT; RAY; RUN; RYA; SAI; SAN; SAR; SAT; SAU; SAV; SAY; SEI; SET; SIC; SIS; SIT; STY; SUN; SUR; TAI; TAN; TAR; TAS; TAU; TAV; TAY; TES; TIC; TIE; TIS; UNS; VAN; VAR; VAS; VAT; VAU; VIA; VIE; VIS; YAR; YUS.

4-letter words (1 point): 60

AITS; ANUS; ATES; AYUS; CIST; CITE; CITS; CITY; ETAS; ETIC; ISNA; ITAS; NARY; NATS; RAIS; RAIT; RATE; RATS; RAUN; RUNS; RUSA; RYAS; SAIC; SAIS; SATE; SATI; SAVS; SEIS; SETA; SICS; SIES; SIST; SITE; SITS; SNAR; STAR; STAY; STIE; SURA; TAIS; TANS; TAUS; TAVS; TIAR; TICS; TIES; UNAI; VANS; VARY; VATS; VAUS; VIAS; VIES; VISA; VISE; VITA; VITE; YATE; YITE; YUAN.

5-letter words (2 points): 32

AVISE; CITES; NATES; NATIS; RAISE; RAITS; RATES; RAUNS; SAICS; SAIST; SATES; SATIS; SATYR; SAURY; SEITY; SITAR; SITES; SNARY; STAUN; SURAT; TYRAN; UNAIS; UNARY; UNSAY; URATE; VARUS; VATIC; VISTA; VITAS; YATES; YITES; YUANS.

6-letter words (3 points): 9

NAVIES; SEITAN; SIESTA; STAUNS; SURATS; TYRANS; URATES; URATIC; VISTAS.

7-letter words (7 points): 3

SEITANS; SUAVITY; TANSIES.