Only 40 sounds? Heh, my cat would top that in a heartbeat and we have come to understand almost all of them.
She has a distinct meow when she is hungry.
Another one for "the water bowl needs fresh water!"
The, "about time you got home, now pay attention human!"
Next is the, "You need to wake up, it is time for you to pay attention to me!"
We have the, "Why is this door blocking my way to get outside?"
The often used, "You are not where you are supposed to be!"
How about, "Hey! My box is dirty! CLEAN IT NOW!"
Of course there is, "Thank you for taking care of me." (usually accompanied by a head butt)
Next, "If I only had thumbs.." (muttered in frustration as she attempts to open something)
The daily, "Where did it go, where did it go!" (usually early morning hours when she is hunting rabbits in the living room)
And, "When I get my paws on that it is soooooo shredded!"
She also queries, "Why are you ignoring me?"
Ignore her long enough, "Fine, I'll go sit over here and show you!"
Pay attention to her, "Much better human, now you are getting it. I am the center of your world".
The persistant, "I am coming over to see you, get ready for me".
The confused, "What is that smell?" (usually when she is sniffing a human)
The, "ITS PLAYTIME DAD!!!"
The favorite, "What the heck are you doing in my space?!?!"
The scary, "Get away from me or I will rip off your face and feed it to the squirrels".
While looking outside, "Hey guys, come play with me!" (she thinks she is related to the squirrels and racoons)
The ominous, "What the frak are you doing in my yard!?!?!" (birds)
Those are the ones we have absolutely identified. There are many others. Some accompanied by a cooing sound, others with purrs, sometimes a mixture of coo and purr. Growls, hisses. She is one animated kitty and not afraid to tell you about it.