1. Take sides with; align oneself with; show strong sympathy for
   "We all rooted for the home team"
   - pull

Type of: side

• family Opisthocomidae
• family Opisthognathidae
• family Orchestiidae
• family Orchidaceae
• family Orectolobidae
• family Oriolidae
• family Ornithorhynchidae
• family Orobanchaceae
• family Orycteropodidae
• family Oscillatoriaceae
• family Osmeridae
• family Osmundaceae
• family Osteoglossidae
• family Ostraciidae
• family Ostraciontidae
• family Ostreidae
• family Otariidae
• family Otididae
• family Oxalidaceae
• family Oxyuridae
• family Paeoniaceae
• family Paguridae
• family Palaemonidae
• family Palinuridae
• family Palmaceae