I've got a CS5 package:
Photoshop
Fireworks
Illustrator
Dreamweaver
Muse*
Captivate*
Flash
Flash Catalyst
Flash Builder
Acrobat Reader
Acrobat Pro
Bridge
Device Central
Contribute
Media Encoder
Media Player
*not part of CS5; added separately
Using the Activity Monitor is the only way I can catch and stop the Adobe process. An awkward solution; at the least I can keep the machine from overheating.
Thanks bvoisin, I'll follow your advice.