6 letter word: E O N P I G

3 letter words
EGO
EON
GEN
GIN
ION
NIP
ONE
OPE
PEG
PEN
PIE
PIG
PIN
POI

4 letter words
GONE
NOPE
OPEN
PEON
PINE
PING
PONE
PONG

5 letter words
OPINE
OPING

6 letter words
PIGEON