1. Belonging to them

Sounds like: there's

Encyclopedia: Theirs

• erythroid
• erythrolysin
• erythromycin
• Erythronium
• Erythronium albidum
• Erythronium americanum
• Erythronium californicum
• Erythronium dens-canis
• Erythronium grandiflorum
• Erythronium montanum
• erythropoiesis
• erythropoietic
• erythropoietin
• Erythroxylaceae
• Erythroxylon
• Erythroxylon coca
• Erythroxylon truxiuense
• Erythroxylum
• Es
• Esaki
• Esau
• escadrille
• escalade
• escalader
• escalate