Solutions :

3-letter words (1 point): 57

AAS; ANA; ANE; ANN; ANY; ATE; BAA; BAN; BAT; BEE; BEN; BET; EAN; EAS; EAT; EAU; EEN; ENE; ENS; ERE; ERN; ETA; NAB; NAE; NAN; NAS; NAT; NEB; NEE; NET; NUS; NYE; NYS; REE; REN; SAE; SAN; SAT; SAU; SEA; SNY; SUN; SUS; SYE; SYN; TAB; TAE; TAN; TAS; TAU; TEA; TEE; TEN; UNS; USE; YEN; YUS.

4-letter words (1 point): 58

ABET; ANAN; ANAS; ANNA; ANNS; ANSA; ANUS; ASEA; AUNE; BAAS; BANE; BANS; BATE; BEAN; BEAT; BEEN; BEER; BENE; BETA; EANS; EAUS; ERNE; ESNE; ETAS; EYNE; NAAN; NABE; NANA; NANE; NANS; NEAT; NENE; REAN; REEN; RENS; RENY; SANE; SANS; SATE; SEAN; SEAT; SNAB; SNEE; SNYE; SUNN; SUNS; SYEN; SYNE; TAES; TANA; TANE; TANS; TAUS; TEEN; TEER; TENE; YENS; YUAN.

5-letter words (2 points): 37

ANATA; ANNAS; ANNAT; ANSAE; ASANA; BANNS; BEANS; BEANY; BENNE; BENNY; BETAS; EATEN; ENATE; NAANS; NANAS; NANUA; REANS; REATA; REATE; REENS; RENEY; RENNE; SANER; SAUNA; SEANS; SNEER; SUNNA; SUNNY; SYENS; TANAS; TANNA; TANSY; TEENE; TEENY; TENNE; TENNY; YUANS.

6-letter words (3 points): 17

ANATAS; ANSATE; BANNER; BANNET; ENNUYE; ENSATE; NAUSEA; REATAS; RENEYS; RENNET; SATEEN; SUNNAS; TANNAS; TANNER; TEENER; TENNER; UNSEAT.

7-letter words (7 points): 3

ANATASE; ENNUYEE; RENNASE.

8-letter word (11 points): 1

NAUSEATE.