Related Clues:

• Thicker
• Grasping things more slowly
• More solid
• More thickly packed
• Admitting less light
• Thicker-witted
• Less sparse
• More dense or concentrated
• Denser
• 'Blood is . . . . . . . than water'
• It's more than a bit of thick to have a buck around the poles like this
• Comparatively thick-skulled
• Slower to pick up
• More jam-packed
• More tightly packed together