Solutions :

3-letter words (1 point): 27

ACE; BIN; BIO; CEP; CON; COO; EIK; ICE; ICK; INK; ION; KIP; NIB; NON; NOO; ONO; OON; PEA; PEC; PIA; PIC; PIE; PIR; RIB; RIN; RIP; UNI.

4-letter words (1 point): 32

BECK; BICE; BINK; BRIN; BRIO; CION; COIN; COIR; CONI; CONK; COON; ECCO; EPIC; ICON; KIBE; KIPE; NICK; NOCK; NOIR; NONI; NOON; OINK; PECK; PICA; PICE; PICK; PIRN; RICK; RINK; RIPE; UNCI; UNCO.

5-letter words (2 points): 10

BICEP; BRICK; BRINK; CONIN; ONION; PRICK; PRINK; PRION; UNCIA; UNION.

6-letter words (3 points): 3

BICKIE; RIPECK; UNCIAE.

7-letter word (7 points): 1

BRICKIE.