She's got a lot to say.

Words Rachel signs all the time:
Eat
Milk
More (sometimes it's a variation on her high chair tray)
All done/Finished
Clean/Clean up
Bed
Change
Dad
Ball
Hat
Fan (this is her current favorite!)

Signs we've seen at least once or twice:
Water
Please
Help
Mom
Medicine
Outside

Words Rachel says all the time:
Ah Dun (all done)
Da(h)d
dow(n)
That (she points to everything and says "that")

Words she's said at least once or twice:
Mama
nigh(t) nigh(t)
ba(th)
ba(ll) - These actually do sound different.
du(ck)

Chuck would probably have more to add to the list. I'm sure she says/signs different things to him than she does to me.