9 letter words:
improving17,
7 letter words:
proving13,
priming12,
romping12,
6 letter words:
improv13,
moving12,
imping11,
moping11,
riving10,
roving10,
virgin10,
miring9,
pirogi9,
poring9,
riming9,
riping9,
roping9,
virion9,
origin7,
5 letter words:
primi9,
primo9,
vigor9,
gipon8,
oping8,
piing8,
pingo8,
pirog8,
prong8,
imino7,
minor7,
mirin7,
orpin7,
prion7,
giron6,
groin6,
iring6,
4 letter words:
gimp9,
impi8,
prim8,
prom8,
romp8,
gorm7,
gorp7,
grim7,
grip7,
ping7,
pong7,
prig7,
prog7,
vino7,
mini6,
miri6,
morn6,
norm6,
pion6,
pirn6,
porn6,
girn5,
giro5,
grin5,
ring5,
inro4,
iron4,
noir4,
nori4,
3 letter words:
vim8,
imp7,
mop7,
pom7,
vig7,
gip6,
mig6,
mog6,
pig6,
mir5,
mon5,
mor5,
nim5,
nip5,
nom5,
pin5,
poi5,
pro5,
rim5,
rip5,
rom5,
gin4,
gor4,
nog4,
rig4,
ion3,
nor3,
rin3,
2 letter words:
mi4,
mo4,
om4,
op4,
pi4,
go3,
in2,
no2,
oi2,
on2,
or2,