0
"enodo" says http://latinlexicon.org/definition.php?p1=1155418&p2=e
Udmurt umlaut unbelt unbent unbolt Undset unhurt unjust unkept unknot unrest unseat unsent upbeat upcast uplift upmost uproot upshot urgent utmost
Here's a list from my dictionary:
analog
anchor
anodos
anyhow
enamor
gnomon
indoor
inflow
intron
intros
unclog
uncool
unhood
unhook
unison
unknot
unmoor
unroof
unroot
unshod
unstop
untrod
donut
knout
outdo
tondo
dunk
dunt
knot
koto
kudo
nook
noon
noun
onto
took
toon
udon
undo
unto
don
dot
dun
duo
nod
noo
not
nun
nut
ono
oot
oud
out
tod
ton
too
tun
udo
do
no
nu
od
on
to
un
ut