Solutions :

3-letter words (1 point): 48

ABO; AUA; AUE; BEE; BET; BOA; BOP; BOW; EAU; ERE; EWT; FIR; FIT; IRE; OBA; OBE; OPE; OWE; OWT; PEA; PEE; PET; PEW; PIR; PIT; POA; POW; REE; RET; REZ; RIF; RIP; RIT; TEA; TEE; TEW; TIP; TWO; TWP; UTE; WEB; WEE; WET; WIT; WOE; WOP; ZEA; ZEE.

4-letter words (1 point): 24

ABET; BEAU; BETE; BOEP; BOET; BOWR; FIRE; OWRE; PEBA; POET; RETE; RIPE; RITE; RITZ; TEER; TIRE; TREE; TREZ; TRIP; TWEE; WIPE; WIRE; WITE; WRIT.

5-letter words (2 points): 11

BEAUT; BOWET; ETWEE; PETER; PETRE; PEWIT; POWRE; TRIPE; TWIRE; UTERI; WRITE.

6-letter words (3 points): 4

BEEZER; PEWTER; POWTER; TWEEZE.

7-letter word (7 points): 1

TWEEZER.