Solutions :

Boggle T I F G U P O E I A U N Z E O C

3-letter words (1 point): 46

APO; APT; AUE; CON; CUE; CUP; EAU; EGO; EON; FEG; FEN; FEU; FIT; FOE; FOG; FON; FOP; FOU; GEN; GEO; GOA; GOE; GON; ION; NEF; NEG; NOG; ONE; ONO; OPT; OUP; PIA; PIE; PIT; PIU; POA; POI; PUN; PUT; TIP; TUI; TUP; UPO; ZAP; ZEA; ZIP.

4-letter words (1 point): 18

AEON; AUNE; CONE; COUP; EUOI; FOEN; FONE; GENU; GONE; NOUP; OUPA; PION; PIZE; PONE; PTUI; TIPI; UNCO; UPON.

5-letter words (2 points): 5

COAPT; GENOA; GENUA; GONEF; PAEON.

6-letter word (3 points): 1

COUPON.