Isaac's vocabulary

In belated honor of his half-birthday, I thought I'd undertake a project to make a list of the words Isaac uses. Here I say "uses" to mean words that he freely says where it is clear he knows what they mean. We can get him to say just about anything parrot-style (ala "That's a statue. Can you say 'statue'?").

Perhaps I've mentioned before that he is a psycho-chatterbox? I guess I didn't realize just how prolific his vocabulary is until I sat down to make this list. We're talking single words here, not phrases ... and it's over 80 words long. Not including animal sounds. Granted, a goodly portion of these words may be unintelligible to the layman, but if one spends about a day being indoctrinated in Isaac-ese, his dialect becomes much easier to follow. At first most of these words came in by themselves, with pointing. As in, seeing a truck on the street, he points and says "Truck!" But this single-wordery has been almost entirely replaced by phrases. As in, seeing a truck on the street, he points and says "It's truck!" or "That's a truck!" Most words appear to be acquired from reading books together (especially about animals), but we have noticed a rapid boost in Wiggles-acquired terminology. Here it is, in no particular order, the complete Isaac Dictionary as of 18 months. Rather long, but I think such length is fitting tribute to the enormous verbal accomplishments of my budding linguist:

Mama
Dada
elephant
Elmo
Big Bird
Wiggles
squirrel
school
boy
girl
animal
banana (pronounced "mee-mah". Go figure)
mango
apple (=all round fruits or vegetables)
cheese
juice (=juice or milk)
water
moon
night-night
choo-choo (=train, of course)
hat
hello (=phone)
bird
rooster
cow
no
sorry
pickle
bye-bye
ball
flower
butterfly
ear
nose
toe
shoe
sock
foot
eye
sky
fly
frog
kitty
doggy
book
hot
cookie (=cookie or Cookie Monster)
baby
duck
up
down
one
two
three
mambo (=Bear of Big Blue House fame)
block
bib
balloon
cracker
bike
circle
star
vacuum
guitar (pronounced "gee")
car
truck
fish
movie
dinosaur
potty
bubble
spoon
slide
whee
swing
more
yucky
wheel
stroller
octopus
coffee
rock
tree

And we have the following animal sounds:
lion = "rrrrroar!"
bear = "grrrr!"
cow = "moo"
duck = "quack"
bird = "tweet-tweet" or "caw"
horse = "neigh"
goat/sheep = "meh"
rooster = "doodle-oo"
chicken = "bawk"
dog = "woof"
cat = "meow"
owl = "hoo-hoo"

Phrases:
"Bye-bye, X"
"I see you" and also "I see X"
"That's X" or "It's X" and also "That's not X"
"Where's X?"
"Let's go!"

It's just unbelievable, really, how much he can say and how eager he is to learn more. And to think it was a year ago and he wasn't even crawling, much less talking.