1. They are

Sounds like: their, there

• coextension
• coextensive
• cofactor
• Coffea
• Coffea arabica
• Coffea canephora
• Coffea liberica
• Coffea robusta
• coffee
• coffee bar
• coffee bean
• coffee blight
• coffee break
• coffee can
• coffee cappuccino
• coffee cream
• coffee cup
• coffee fern
• coffee filter
• coffee fungus
• coffee grinder
• coffee grounds
• coffee klatch
• coffee klatsch
• coffee liqueur