All of these words were said (at least twice in context to count!) before the end of Feburary 2011.
Mom, Mom-Mom, My Momma, Mom- Ma
Dad, Da-Dad, Dad-Dad
That
Yeah
No
Cheese
Please
Jeez - (Jesus)
Jeez-Momma (Mary)
Jeez-Dad (Joseph)
Pizza (sometimes ZA!)
Out
Bath
Hot (as in temperature)
Hot! (the grill, the oven)
Hot (a hot dog)
Nanas (banana)
Nana (Grandma Douglas)
Nana Pop, Pop (Grandpa Douglas)
Shh...
UP
Fooz (Juice)
Foof (Snow)
Dog
Mmmmmoo (cow)
Hat
Ow
Oh
On
Off
Ern (Ernie from Sesame Street)
At (Aunt Rachel)
Oon (moon)
Oon (balloon)
feesh (fish)
Fiii (fire, fire place)
Eeeow, meeow (cat)
Ite (write)
I Ites (I write)
ashes, ashes (as in, we all fall down)
Block
Chock (chocolate)
Bap (bath)
Bup (cup)
Bamp (lamp)
Wish-Wish (washing, laundry)
Nigh-nigh (good night, sleep)
Een Up! (clean up, always sang)
Repeats many letters in alphabet song, especially A, B, C, E, H, S, T, P, R, Z