The 3-shift(needs cleaning too):
ache -> cavy
achy -> cave
aloo -> croo
alow -> crog
aril -> clur
bias -> buck
bike -> busy
bile -> bury
bilk -> burs
bill -> burr
bink -> bups
birr -> bull
blow -> brog
blub -> brib
bock -> boas
bogy -> bowe
boil -> bour
boke -> bosy
boko -> boso
boks -> bosk
boll -> borr
bolo -> boro
blow -> brog
bony -> bope
boob -> boob
book -> boos
bool -> boor
bron -> blop
brog -> blow
broo -> bloo
brow -> blog
buck -> bias
bunk -> bips
calo -> acro
cask -> acks(anagram
)
case -> acky
chur -> Avil
clop -> Aron
clog -> arow
coin -> aoup
coij -> aout
crow -> alog
docs -> zoak
dodo -> zozo
dols -> zork
dope -> zony
dops -> zonk
dopy -> zone
dups -> zink
durr -> zill
ecce -> yaay
girn -> wulp
girr -> wull
goby -> wobe
gole -> wory
golp -> worn
gone -> wopy
gonk -> wops
gook -> woos
goon -> woop
goop -> woon
goor -> wool
gule -> wiry
guly -> wire
gups -> wink
hoke -> vosy
hole -> vory
hoon -> voop
hoop -> voon
Hyle -> very
jibb -> tubb
jill -> turr
jinn -> tupp
jobe -> toby
jock -> toas
join -> toup
joke -> tosy
joky -> tose
jole -> Tory
joll -> torr
jols -> tork
jors -> Tolk
jour -> toil
junk -> tips
jupe -> tiny
jure -> tily
jury -> tile
kail -> scur
kale -> scry
kaon -> scop
kibe -> suby
kiln -> surp
kilp -> surn
kipe -> suny
kipp -> sunn
kips -> sunk
kirs -> sulk
kias -> suck
kyak -> secs
lias -> ruck
like -> rusy
liny -> rupe
lipe -> runy
lire -> ruly
lirk -> ruls
lisk -> ruks
lobo -> robo
lode -> rozy
loin -> roup
loke -> rosy
loll -> rorr
lone -> ropy
look -> roos
loon -> roop
loop -> roon
loor -> rool(backwards!)
loos -> rook
lops -> ronk
lory -> role
loto -> rojo
luck -> Rias
lure -> rily
lunk -> rips
lune -> ripy
luny -> ripe
mice -> quay
nick -> puas
nips -> punk
nixy -> pufe
nock -> poas
node -> pozy
noil -> pour
none -> popy
nook -> poos
noon -> poop
noop -> poon(abackwards)
nope -> pony
nosy -> poke
noun -> poip
noup -> poin
nurr -> pill
nyas -> peck
ogre -> owly
olpe -> orny
ooze -> oody
oozy -> oode
oulk -> oirs
oups -> oink
owly -> ogre
owle -> ogly
peck -> nyas
pias -> nuck
pike -> nusy
pila -> nurc
pile -> nury
pill -> nurr
pipe -> nuny
pirs -> nulk
poke -> nosy
poky -> nose
pooh -> noov
pook -> noos
pool -> noor
poon -> noop(backwards)
poop -> noon
poor -> nool
poos -> nook
pops -> nonk
pory -> nole
pulk -> nirs
puls -> nirk
puly -> nire
purr -> nill(joll -> torr is similar since joll -(only caesar)> purr and torr -(only caesar)> nill)
pyas -> neck
quay -> mice
qop -> Mion
reck -> Lyas
reny -> lype
rick -> luas
ricy -> luae
Rias -> luck
roky -> lose
roll -> lorr
rone -> lopy
rook -> loos
roon -> llop(roon also goes to beef and psst!)
roop -> loon
roos -> look
rope -> lony
ropy -> lone
rory -> lole
rosy -> loke
roup -> loin
ruck -> lias
silo -> kuro
sips -> kunk
slob -> krob
sloe -> kroy
slop -> kron
slow -> krog
sloo -> kroo
slub -> krib
slur -> kril
solo -> koro
sols -> kork
soon -> koop
soop -> koon
sops -> konk
sour -> koil
sous -> koik
spun -> knip
spuj -> knit
suck -> kias
sulk -> kirs
sudd -> kizz
sups -> kink
tile -> jury
tils -> jurk
tips -> junk
tire -> July
toon -> joop
tops -> jonk
Tory -> jole
tuny -> jipe
typy -> Jene
typp -> Jenn
tyro -> jelo(again, punk -> nips is similar because Caesar cipher)
vire -> huly
vols -> hork
volk -> hors
vuln -> hirp
wice -> guay
wich -> guav
wili -> guru
will -> gurr
wily -> gure
winy -> gupe(also see 9: cote -> gupe)
wink -> gups
wock -> goas
woke -> gosy
wonk -> gops
wops -> gonk
yaup -> ecin
yelk -> eyrs
yesk -> eyks
zips -> dunk
zone -> dopy
zoon -> doop