baba (blanket or bottle)
beddy-bye (go to bed, sleeping, bedtime)
binkie (pacifier (dummy) or blanket)
blankie (blanket)
boo-boo (wound or bruise)
bubby (brother)
dada (dad, daddy)
didee (diaper)
din-din (dinner)
doedoes (In South African English, the equivalent of beddy-bye)
num nums (food/dinner)
ickle (little (chiefly British))
icky (disgusting)
jammies (pajamas)
nana (grandmother)
oopsie-daisy (small accident)
owie (wound or bruise)
passie or paci (pacifier (dummy))
pee-pee (urinate or penis)
poo-poo or doo-doo (defecation)
potty (toilet)
sissy (sister)
sleepy-bye (go to bed, sleeping, bedtime)
stinky (defecation)
tummy (stomach)
wawa (water)
wee-wee (urination or penis)
widdle (urine (chiefly British))
widdle (little (chiefly American))
wuv (love)
yucky (disgusting)
yum-yum (meal time)
mama (mother)
uppie (wanting to be picked up)
Moreover, many words can be derived into baby talk following certain rules of transformation, in English adding a terminal /i/ sound is a common way to form a diminutive which is used as part of baby talk, examples include:
horsey (from horse)
kitty (from cat or kitten)
potty (originally from pot now equivalent to modern toilet)
doggy (from dog)
("Puppy" is often erroneously thought to be a diminutive of pup made this way, but it is in fact the other way around: pup is a shortening of puppy, which comes from French popi or poupée.)
Au dodo! = Time for bed! Off to bed!
Avoir bobo = Have sthg that hurts. “T’as bobo à la menotte?” = Does your hand hurt?
Bichounet = [term of endearment for little boys] Little man, my little soldier
Bichounette = [term of endearment for little girls] Sweetie, sweetheart, sugar plum
Le bobo = a sore, a bruise, a scratch, a cut
Le caca = poo, doo-doo, number two
Le chat-chat = pussy cat, kitty cat, pussy, kitty, moggie
Le chien-chien = doggy
Choupinet = [term of endearment for little boys] Little man, my little soldier
Choupinette = [term of endearment for little girls] Sweetie, sweetheart, sugar plum
Coucou! = Coo-ee! Peep-bo! Peek-a-boo! [Said to babies]
Le cricri = cricket (insect)
Le dada = horsey
Le doudou (les doudous) = confort blanket, blan-blan, blankie [helps child to sleep]
Les doudouces = caresses, soothing strokes
Faire caca = to do a poo, to do a doo-doo, to do/have a number two
Faire dodo = To sleep, to go to beddy-byes/beddie-byes
Faire joujou = to play
Faire panpan = to smack
Faire pipi = to wee-wee, to pee-pee, to do/have a number one
Faire sisite = to sit down
La fifille = little girl
Gazou gazou = Coo-ee! [Literally - Chirp Chirp! Said to babies]
La grosse commission = poo, doo-doo, number two
Le joujou (les joujoux) = toy
Le lolo = milk
Le loulou (les loulous) = snot, bogies
La maman = mum, mummy
La mémé = Grandma, Granny, Nana
La menotte = hand
Le minou (les minous) = pussy cat, kitty cat, pussy, kitty, moggie
La moumouche = little fly
La moumousse = foam, bathtime bubbles
Le nounours = teddy bear
Le ouah-ouah = bow-wow, doggy
Le panpan = smack, clout
Le papa = dad, daddy
La papatte = leg, hand also????
Le pépé = Granddad, Grandad
Le pépète / la pépétte = botty/bottie, bottom, backside
Le pipi = wee-wee, pee-pee, number one
La poupoule = chicken
Le prout = fart, trump, bottie-pop
Les quenottes (f) = toothie-pegs
La tata = auntie, aunt
La tatie = auntie, aunt
Le tonton = uncle
Les totos = head lice, nits
La totoche = dummy, soother, pacifier
La totosse = dummy, soother, pacifier
Le toutou (les toutous) = doggy, pooch
La tutute = dummy, soother, pacifier
Le venventre = tummy, belly
Le zizi = willy (male genital organ)