1. Belonging to them

Sounds like: there's

Encyclopedia: Theirs

• Alaskan pipeline
• alastrim
• alate
• alated
• Alauda
• Alauda arvensis
• Alaudidae
• alb
• albacore
• Alban Berg
• Albania
• Albanian
• Albanian capital
• Albanian monetary unit
• Albany
• Albatrellus
• Albatrellus dispansus
• Albatrellus ovinus
• albatross
• albedo
• Albee
• albeit
• Alben Barkley
• Alben William Barkley
• Albers