I bet Bailey knows more words than you think.

My boys know too many. I have to be careful what I say around them. "Do you want" and "alright" makes them jump up because they think they are going to go somewhere.
My favorites that they know are:
pizza (they get parmesan cheese)
sweet potato
other side (when walking on leash)
give me some loving
blanket
tshirt
towel
deck
They always know where to go, which door or cabinet, etc, no matter what I say to them. Sometimes I ask if they want to go to the moon and I get a classic Yorkie head tilt.