Related Clues:

• Part of the lymphatic system
• Protu berance-
• Bump on a log
• Lymph gland
• Airline's home base
• Where spokes meet
• Boston nickname
• Critical point on a graph
• Anatomical bulge
• Boston, with 'The'
• Connecting point
• Airline home base
• O'Hare, e.g.
• Activity center
• Nave