lifework (n.)

• activity
• art
• business
• calling
• campaign
• career
• careerism
• cause
• commitment
• craft
• crusade
• drive
• faith
• game
• handicraft
• interest
• issue
• line
• metier
• mission
• movement
• mystery
• number
• occupation
• practice
• principle
• profession
• pursuit
• racket
• specialization
• specialty
• trade
• vocation
• walk
• work