Calvin the Genius

My dog, Calvin, has a large vocabulary. Here are the words I'm sure he knows. There are probably others, as he keeps surprising me.

Walking words: leash, walk, go, wait, stop, turn, choose.
Eating words: food, water, treat, cookie, liver, hungry, starving, eat, drink, something special, magic.
Toys: Snake, Basketball, Hedgey, Rex, Ball, Duck, Piggy, Monkey, Toy, BigBone.
Animal friends: Nell, Dalla, Tasha, Charlie, Wilson, Mikey, Kitty, Bella, someone (Nell), her (Nell).
Social words: company, visit, "go say hi", work (he's a therapy dog), "s/he decides" (whether to pet Calvin), "you may ask" (for attention).
Activities: ride, go somewhere (the park), go out, song.
Walking Routes: morning walk, up and over (the hill), quickie, bedtime walk, go see her (visit Nell).
Commands: sit, down, stay, come, leave it, stop it, go to bed, gimme, settle, gimme paw, other, go pee, use your nice voice.

I'll add more as I remember them.