Solutions :

3-letter words (1 point): 51

AKA; AKE; ALS; ARE; ARK; ARS; AUE; AUK; DEE; DOS; DSO; DUE; EAR; EAU; EDS; EEK; ERA; ERE; ERK; ERS; ESS; EST; EUK; KAE; KEA; KED; KUE; LUD; ODE; ODS; RED; REE; RES; RET; SEA; SED; SEE; SER; SET; SOD; SUD; SUE; SUK; SUS; TEE; TES; UDO; UDS; UKE; ULU; USE.

4-letter words (1 point): 92

AKED; AKEE; AKES; ALSO; AREA; ARED; ARES; ARET; ARSE; AULD; DEAL; DEAR; DEER; DEES; DEET; DERE; DEUS; DUAL; DUES; DUKA; DUKE; DUST; EARS; EAUS; ERED; ERES; ERST; ESES; ESSE; ESTS; KAED; KAES; KEDS; KEET; KEST; KUDO; KUES; KULA; LAER; LAKE; LAUD; LUAU; LUDE; LUDO; LUDS; LUES; LUKE; LUST; ODEA; ODES; RAKE; RAKU; REAK; REAL; REDO; REDS; REED; REEK; REES; REST; RETS; SEAL; SEAR; SEED; SEEK; SEER; SEES; SERA; SERE; SERK; SERS; SESE; SETS; SLAE; SLUE; SODS; SUDS; SUED; SUER; SUES; SULU; SUSS; TEED; TEEK; TEER; TEES; UDOS; UKES; ULUS; USED; USER; USES.

5-letter words (2 points): 68

AKEES; ALDEA; ALDER; AREAL; ARETS; ARKED; ARSED; ARSES; DEALS; DEARE; DEARS; DEERS; DEETS; DERES; DESSE; DUALS; DUKES; DUSTS; EARST; ERSES; ESTER; KARST; KEETS; KESTS; KUDOS; LAERS; LAKED; LAKER; LAKES; LAUDS; LUAUS; LUDES; LUDOS; LUSER; LUSTS; RAKED; RAKEE; RAKES; RAKUS; REALS; REDOS; REEDS; REEST; RESES; RESET; RESTS; REUSE; SEALS; SEARE; SEEDS; SEERS; SERED; SERES; SLAES; SLAKE; SLUED; SLUES; SLUSE; STEED; STEEK; STEER; STERE; SUERS; SUSES; TEERS; TEREK; TERES; TERSE.

6-letter words (3 points): 26

ALDERS; AULDER; DEARES; DEKARE; DUSTER; KARSTS; LAKERS; LAUDER; LUSTER; RAKEES; REESTS; RESEAL; RESEAU; RESETS; REUSES; SEREST; SLAKED; SLAKER; SLAKES; SLUSES; STEEDS; STEERS; STERES; SUDSER; SUDSES; TEREDO.

7-letter words (7 points): 11

AULDEST; AUSTERE; DEAREST; DEKARES; LAUDERS; RESEALS; RESEAUS; SEAREST; SLAKERS; TEREDOS; TESSERA.

8-letter word (11 points): 1

LUSTERED.