1. Inability to produce hybrids that are both viable and fertile

Type of: infertility, sterility

• Orangeism
• Orangeman
• orangeness
• orangery
• orangewood
• orangish
• orangish-red
• orangutan
• orangutang
• Orasone
• orate
• oration
• orator
• oratorical
• oratorio
• oratory
• oratrix
• orb
• orb web
• orb-weaver
• orb-weaving
• orb-weaving spider
• orbicular
• orbiculate
• orbiculate leaf