6 letter words:
apnoea8,
unopen8,
5 letter words:
apnea7,
paean7,
paeon7,
panne7,
penna7,
unpen7,
nanua5,
4 letter words:
napa6,
nape6,
neap6,
nope6,
noup6,
open6,
oupa6,
pane6,
paua6,
pean6,
peon6,
pone6,
puna6,
upon6,
aeon4,
anan4,
anna4,
anno4,
anoa4,
anon4,
aune4,
eoan4,
naan4,
nana4,
nane4,
neon4,
nona4,
none4,
noun4,
3 letter words:
ape5,
apo5,
nap5,
nep5,
ope5,
oup5,
pan5,
pea5,
pen5,
poa5,
pun5,
upo5,
ana3,
ane3,
ann3,
aua3,
aue3,
ean3,
eau3,
eon3,
nae3,
nan3,
non3,
nun3,
one3,
2 letter words:
op4,
pa4,
pe4,
po4,
up4,
aa2,
ae2,
an2,
ea2,
en2,
na2,
ne2,
no2,
nu2,
oe2,
on2,
ou2,
un2,