7 letter words
PHOENIX​19
6 letter words
PHENIX​18
5 letter words
PHONE​10
OPINE​7
PHEON​10
4 letter words (16 words)
OPEN​6
HOPE​9
PINE​6
EXPO​13
NOPE​6
EXON​11
HONE​7
OXEN​11
PION​6
PHON​9
PEON​6
PONE​6
ONIE​4
PENI​6
PEIN​6
NIXE​11
3 letter words (32 words)
ONE​3
HIP​8
PIN​5
HOP​8
PEN​5
ION​3
PIE​5
HON​6
PHI​8
PIX​12
HEX​13
HEN​6
NIP​5
HEP​8
NIE​3
NOX​10
HOE​6
NIX​10
NEP​5
HIN​6
2 letter words (20 words)
IN​2
ON​2
NO​2
HE​5
EN​2
OH​5
HI​5
EX​9
PO​4
NE​2
OP​4
HO​5
PI​4
PE​4
OE​2
XI​9
EH​5
IO​2
OI​2
OX​9