6+ Letter Words from the Large Lexicon with 2 or 3 unique letters.

aenean
akeake
alfalfa
allele
amamau
amimia
ananas
ananda
anapanapa
annona
appall
ararao
arrear
assbaa
assess
assessee
atlatl
auhuhu
bacaba
banaba
banana
baobab
barabara
batata
bedded
benben
bibiri
bonbon
boobook
boohoo
bowwow
bulbul
camaca
cancan
caracara
chichi
chocho
cnicin
cocoon
curucucu
cuscus
deedeed
degged
deseed
diiodo
dodded
doodad
dugdug
dumdum
effete
enaena
entente
epopee
ewerer
farfara
feoffee
furfur
gabgab
galagala
galgal
gangan
ganggang
geejee
geggee
gegger
giggit
ginning
googol
grigri
grugru
gulgul
gunnung
hallah
hammam
hoodoo
horror
hubbub
humhum
ilicic
inning
iwaiwa
jeerer
kakkak
karaka
kawaka
keeker
kiekie
kivikivi
kiwikiwi
kokako
kokoon
kolokolo
kuskus
lablab
lessee
lollop
mammal
mammee
mannan
maomao
marara
matamata
miamia
missis
mocomoco
motmot
mulmul
murmur
murumuru
mutuum
muumuu
nagana
nagnag
natant
noncon
nonene
nonion
oidioid
pallall
palpal
papaya
patapat
pawpaw
peeper
peepeye
peewee
pepper
pepperer
pipiri
pippin
piripiri
pitpit
pookoo
poroporo
powwow
ramarama
rearer
redder
redeed
reeded
reeder
reefer
reeker
reeler
reeper
referee
referrer
rereel
rereeve
retree
retter
revere
reverer
riroriro
rococo
seeded
seeress
seesee
semese
semsem
sestet
settee
simsim
sissoo
sooloos
succuss
susurr
susurrus
tarata
tartar
tattoo
tattva
tebbet
teenet
teerer
teeter
teeterer
teethe
teevee
tellee
tenent
terete
terret
testee
testes
tetter
tikitiki
tipiti
titbit
tittie
toatoa
toetoe
tooroo
toozoo
torotoro
tsetse
tumtum
ubussu
uppuff
uppull
valval
venene
voodoo
wagwag
wedded
weeded
weewow
woohoo
zoozoo