Most definitely!

Ripley has a meow that sounds like "momma" when he is getting sick and about to puke.

Jazz has a cry meow that she does when she's knocked her mousie under something and can't get it. It sounds like "NOOOO". She also has a pet me meow.

Scout hardly makes a sound but she will let out a loud meow when she gets excited playing with a toy. She also lets out a big one if another cat jumps her. Otherwise she's basically mute.

Rocky has a baby meow that he does when he wants to be pet or picked up. He usually sits up and milks the air when he does it.

Rumor is my chatter box but only to me. She and I have carried on some lengthy conversations and I've understood some of it.