adj: occurring once every 20 years
Length: 9 letters
Scrabble value: 14
Words with Friends value: 19
Literati value: 12
TWL (USA): Found
SOWPODS (UK): Found
vicennial
aniline
incline
vicinal
alvine
calvin
canine
niacin
valine
veinal
venial
vienna
alien
aline
alive
anile
anvil
calve
cavil
civil
clean
cline
clive
iliac
inane
incan
lance
lenin
linac
linen
linin
liven
naive
nance
navel
venal
vicia
vilna
vinca
acne
anil
anne
cain
cali
cane
cave
cive
clan
elan
elia
evil
inca
inla
lace
laic
lane
lave
lean
lena
levi
lien
line
live
lvii
nail
nave
neva
nice
nile
nina
nine
vain
vale
vali
vane
veal
veil
vein
vela
vena
venn
vial
vice
vila
vile
vine
ace
aec
ail
ain
ale
ali
ane
ani
can
cia
cli
clv
cva
ela
eln
enl
ice
inc
inn
iva
lac
lan
lav
lea
lei
lev
lie
lii
lin
liv
lvi
nac
nan
nec
nil
nne
vac
van
vie
vii
ac
ai
al
an
av
ca
ce
ci
cl
cv
ea
ec
el
en
ev
ia
ic
ie
ii
il
in
iv
la
le
li
lv
na
nc
ne
ni
nv
va
vi
a
c
e
i
l
n
v
vice-presidency
vice-presidential
vice-regent
vicegerent
vicenary
viceregal
vicereine
viceroy
viceroyalty
viceroyship