7 letter words
PRONOUN​9
5 letter words
PORNO​7
4 letter words (14 words)
PORN​6
UPON​6
POOR​6
POUR​6
NOON​4
NOUN​4
POON​6
ROUP​6
NOOP​6
ROOP​6
ROON​4
NOUP​6
OURN​4
PROO​6
3 letter words (20 words)
OUR​3
NON​3
RUN​3
PRO​5
NOR​3
URN​3
NUR​3
POO​5
NUN​3
PUN​5
PUR​5
ONO​3
OOP​5
ROO​3
OUP​5
NOO​3
OOR​3
OON​3
UPO​5
URP​5
2 letter words (11 words)
ON​2
OR​2
NO​2
UP​4
UN​2
PO​4
OP​4
OO​2
UR​2
NU​2
OU​2