1. A featherfoil of the eastern United States with submerged spongy inflated flower stalks and white flowers
   - water gillyflower, American featherfoil

Type of: featherfoil, feather-foil

• sirocco
• sirrah
• sirree
• sirup
• sis
• sisal
• sisal family
• sisal hemp
• sise
• sisham
• siskin
• siskiyou lewisia
• Sison
• Sison amomum
• siss
• sissified
• sissiness
• sissoo
• sissu
• sissy
• sissyish
• sister
• sister-in-law
• sisterhood
• sisterlike