Type I

airy-fairy
argy-bargy
artsy-fartsy
boo hoo
boogie-woogie
bow-wow
ducky-wucky
easy-peasy
fancy shmancy
fiddle diddle
fuddy-duddy
fuzzy wuzzy
hamper-scamper
handy-dandy
hanky-panky
harum-scarum
heebie-jeebies
helter-skelter
herky-jerky
higglety-pigglety
hocus-pocus
hodge-podge
hoity-toity
hokey pokey
holus-bolus
hoochie koochie
hosh posh
hotsy totsy
hubble-bubble
huffy-toughy
hugger-mugger
Hully Gully
hurdy-gurdy
hurly-burly
hurry-scurry
hustle-bustle
itsy-bitsy
jeepers creepers
mumbo-jumbo
namby-pamby
niminy-piminy
nitty gritty

okey-dokey
ooey gooey
palsy-walsy
pell-mell
pow-wow
rag-tag
razzle-dazzle
rinky-dinky
roger dodger
roly-poly
super-duper
ta-da!
teeny-weeny
teensy-weensy
tohu-bohu
tootsie-wootsie
tussy mussy
tutti-frutti
ugly pugly
willy-nilly
wingding
zoot suit

Type II

chit-chat
clip clop
criss-cross
diddle-daddle
dilly-dally
ding-dong
dingle dangle
fiddle-faddle
flim-flam
flip-flop
gewgaw
hip-hop
knick-knack
jibber-jabber
jimjams
jingle-jangle
mish-mash
piddle-paddle
ping pong
pish-posh
pitter-patter
rickrack
riff-raff
riprap
see-saw
shilly-shally
ship-shape
singsong
splish-splash
teeny- tiny
teeter-totter
Tic Tac
tick tock
ticky tacky
tittle-tattle 
wibble-wobble
wig-wag
wishy-washy
witches' britches
ying yang
zigzag
zip zap

ack-ack
aye-aye
bang-bang
beriberi
bling bling
bonbon
boo-boo
buddy-buddy
bye-bye
caca
cha-cha
chichi
choo-choo
chop chop
chow chow
dik-dik
din-din
doo-doo
dumdum
fen-phen
froufrou
gaga
go-go
goo goo
goody goody
ha-ha
hubba-hubba
hush hush
kissy kissy
la-la
lulu
mahi-mahi
mama
muumuu
night-night
no-no
papa
pawpaw

pee-pee
pom-pom 
pooh-pooh
so-so
ta-ta
tom-tom
wee-wee
win-win
yada yada
yo-yo