1. A communist sympathizer (but not a member of the Communist Party)
   - fellow traveller [Brit, Cdn] 
2. A traveler who accompanies you
   - companion, fellow traveller [Brit, Cdn]

Derived forms: fellow travelers

Type of: sympathiser [Brit], sympathizer, traveler [US], traveller [Brit, Cdn], well-wisher

Encyclopedia: Fellow traveler

• group discussion
• group dynamics
• group insurance
• group meeting
• group O
• Group of Eight
• Group of Seven
• group participation
• group practice
• group psychotherapy
• group Pteridospermae
• group Pteridospermaphyta
• group theory
• group therapy
• grouped
• grouper
• groupie
• grouping
• groupthink
• Zoroastrianism
• zoster
• Zostera
• Zostera marina
• Zosteraceae
• Zouave