1. Having the same foci

Encyclopedia: Confocal

• swamp sunflower
• swamp white oak
• swamp willow
• swamphen
• swampland
• swampy
• swampy beggar-ticks
• swan
• swan dive
• swan orchid
• Swan River daisy
• Swan River everlasting
• swan song
• swan's down
• swanflower
• swank
• swanky
• swanlike
• swanneck
• swannery
• Swansea
• swanskin
• Swanson
• swap
• swap file