Solutions :

3-letter words (1 point): 59

AIT; ALE; ALT; ANA; ANE; ANT; ANY; ARD; ARY; ATE; BIO; BIT; BOI; BOR; BOT; BRO; BRU; BUR; DAN; DAY; DRY; EAN; EAT; ELT; ETA; ITA; LAT; LET; NAE; NAT; NAY; NET; OBI; ORB; ORD; OUR; RAD; RAN; RAT; RAY; ROB; ROT; RUB; RYA; TAD; TAE; TAI; TAN; TAR; TAY; TEA; TEL; TEN; TIE; TOR; URB; URD; YAD; YAR.

4-letter words (1 point): 58

ADRY; ALTO; ANAL; ANTA; ANTE; ANTI; BITE; BITO; BORD; BOTA; BURD; BURY; BYTE; DANT; DATE; DRAT; DRAY; DRUB; DYNE; EALE; ELAN; ETNA; IOTA; LANA; LANE; LANT; LATE; LATI; LENT; NARD; NARY; OBIA; OBIT; ORBY; RANA; RANT; RATE; ROTA; ROTE; ROTI; ROTL; RUBY; TALE; TANA; TANE; TEAL; TELA; TELT; TENT; TOBY; TORY; TOUR; TYNE; TYRO; TYTE; URDY; YARD; YATE.

5-letter words (2 points): 31

ADYTA; ALTAR; ANTAE; ANTAR; BIOTA; BITOU; BOITE; BOURD; DAYNT; DRANT; DROIT; DYNEL; ELATE; ENATE; ENTIA; LAITY; LENTI; LENTO; ORBIT; OUBIT; RATEL; RAYNE; ROTAL; ROTAN; TANTI; TANTO; TARDY; TELAE; TENTY; TYRAN; URBIA.

6-letter words (3 points): 14

ADROIT; ANBURY; BORDAR; BOTANY; BOTNET; LANATE; LENTOR; OBITAL; ORBITA; ORBITY; TALENT; TENTIE; TYRANT; UBIETY.

7-letter words (7 points): 4

DAYTALE; LANYARD; ORBITAL; TANYARD.