1. They are

Sounds like: their, there

• neo jazz
• neo-colonialist
• neo-Darwinian
• neo-Darwinism
• neo-Lamarckian
• Neo-Lamarckism
• Neo-Latin
• Neo-Melanesian
• Neobiotic
• Neoceratodus
• Neoceratodus forsteri
• neoclassic
• neoclassical
• neoclassicism
• neoclassicist
• neoclassicistic
• neocolonial
• neocolonialism
• neocon
• neoconservatism
• neoconservative
• neocortex
• neocortical
• neodymium
• neoencephalon