noun: passing from a more complex to a simpler biological form
noun: returning to a former state
Length: 13 letters
Scrabble value: 14
Words with Friends value: 16
Literati value: 13
TWL (USA): Found
SOWPODS (UK): Found
retrogression
regression
retrogress
egression
oestrogen
oogenesis
roisterer
terrorise
erigeron
essonite
estrogen
oestrone
register
reorient
resister
resistor
restorer
retrorse
serotine
songster
steering
stringer
engross
erosion
estrone
genesis
genitor
genoise
greisen
ingress
integer
isoetes
isogone
negress
orestes
regress
regrets
rentier
restore
roister
rooster
rooting
signore
snorter
soignee
soonest
sorting
steiner
stinger
stirrer
strings
terrier
terrine
tigress
torreon
torsion
egoist
egress
enosis
entire
eringo
erring
gerres
gerris
gesner
gneiss
gnosis
goiter
goitre
goonie
greens
grison
ignore
ingest
ingres
insert
isogon
nessie
nester
nestor
noesis
norris
ogress
oregon
orient
origen
orison
orites
ossete
otiose
regent
region
regret
reiter
renoir
renter
resent
resign
resist
resort
rester
retire
ringer
rioter
rogers
rooter
roster
seeing
senior
sensor
serger
series
serine
setose
signer
signet
signor
singer
sinter
sister
snorer
soigne
soiree
sonsie
sooner
sorter
sortie
stereo
sterne
stogie
stoner
stooge
string
strong
tensor
terror
tessin
tigers
torero
torino
tosser
trigon
triose
trogon
tsoris
egest
egret
eigen
enets
ensis
enter
entsi
eosin
ergot
ernst
erose
error
essen
ester
genet
genie
genre
gesso
goner
goose
gorse
green
greet
griot
grist
grits
groin
gross
inert
inger
ingot
inset
inter
intro
irons
isere
negro
niger
niter
nitre
noise
noose
noreg
norge
norse
onset
orion
orris
osier
reign
rente
reset
resin
retie
retro
rigor
rings
rinse
risen
riser
roget
roneo
roost
roots
rosin
rotor
segno
seine
senor
sense
sente
serer
serge
serin
seton
siege
singe
siren
sison
sneer
snoot
snore
snort
sorgo
steen
steer
stein
stern
sting
stone
store
teens
tenge
tenor
tense
teres
terse
tiger
tigon
tinge
toner
tongs
torso
tress
trier
trine
tsine
egis
eire
ergo
erie
erin
eris
erne
eros
erse
erst
gene
gens
gent
giro
gist
goer
gone
goon
gore
grin
gris
grit
grot
inge
inst
iron
nero
ness
nest
nist
nose
note
nrti
ntis
ogee
ogre
oort
oreo
otis
otoe
rein
reit
reno
rent
rest
rete
ring
riot
rise
rite
root
rose
ross
rote
seer
sene
sens
sent
sere
sign
sine
sing
sion
sire
sise
site
snit
snog
snot
sone
song
soon
soot
sore
sort
ssri
stir
teen
tern
tier
tine
ting
tire
tiro
togo
togs
tone
tons
toon
tore
torn
torr
toss
tree
trig
trio
eeg
ego
ene
eon
eos
erg
ern
err
ert
ese
esr
est
gee
gen
get
gin
git
goo
gsr
ige
inr
ins
ion
ire
irs
isn
nee
neo
net
ngo
nit
nog
not
nro
oig
ois
one
oni
ono
ore
orr
oto
res
ret
rig
rio
roe
roi
ron
rot
see
sen
set
sin
sir
sis
sit
son
sos
sot
sse
tee
teg
ten
tie
tin
toe
tog
ton
too
tor
tss
ee
en
er
es
ge
gi
go
ie
ig
in
io
ir
it
ne
ng
ni
no
nt
on
or
os
re
rg
ri
rn
ro
se
sg
si
sn
so
sr
ss
te
ti
tn
e
g
i
n
o
r
s
t
retroflex
retroflexed
retroflexion
retrograde
retrogressive
retronym
retrophyllum
retrorocket