Solutions :

3-letter words (1 point): 46

DEI; DEN; DIE; DIF; DIN; DIS; EIK; END; ENS; EST; FID; FIL; FIN; IDE; ILK; INK; INS; IOS; ISO; ITS; KID; KIF; KIN; KIS; KIT; LID; LIN; NED; NID; NIE; NIL; NIS; OES; OIK; OOS; OSE; SEI; SET; SIK; SIN; SIT; SKI; TES; TIE; TIS; TSK.

4-letter words (1 point): 54

DENI; DENS; DIES; DIET; DINE; DINK; DINS; DISK; EIDE; EIKS; EINE; ESNE; FIND; FINE; FINI; FINK; FINS; ILKS; INKS; ISIT; KILN; KIND; KINE; KINS; KIST; KITE; KITS; LIND; LINE; LINK; LINS; NIDE; NIDI; NIED; NIES; NISI; OIKS; OINK; OOSE; SEIK; SIDE; SIEN; SIND; SINE; SINK; SITE; SKID; SKIN; SKIO; SKIT; SNED; STIE; TIES; TIKI.

5-letter words (2 points): 29

CLINE; CLINK; DEIST; DENIS; DENSE; DIETS; DINKS; EOSIN; FINED; FINIS; FINKS; INDIE; INSET; KILNS; KITES; LIKIN; LINED; LINKS; NEIST; NISEI; OINKS; SEINE; SINED; SKIED; SKITE; SNIDE; STEIN; TEIND; TIKIS.

6-letter words (3 points): 12

CLINKS; DENIES; DINKIE; EOSINE; INDIES; INSIDE; KILNED; KINDIE; LIKINS; OIKIST; SEINED; TIKIED.

7-letter words (7 points): 9

DIKIEST; DINKIES; FIDEIST; FIKIEST; INKIEST; KINDIES; LINDIES; LINIEST; STEINED.

8-letter word (11 points): 1

DINKIEST.