1. Tending to spread quickly
   - aggressive, fast-growing

See also: invasive

• Irena
• Irenaeus
• Irene Joliot-Curie
• irenic
• irenical
• Irenidae
• Iresine
• Iresine herbstii
• Iresine reticulata
• Iridaceae
• iridaceous
• iridaceous plant
• iridectomy
• iridesce
• iridescence
• iridescent
• iridic
• iridium
• iridocyclitis
• iridokeratitis
• iridology
• iridoncus
• Iridoprocne
• Iridoprocne bicolor
• iridosmine