silphium /silˈfi-əm/

1. A plant (perh the umbelliferous Ferula tingitana) imported from Cyrenaica by the Greeks for use as a food and in medicine (historical)
2. (cap) a genus of American composites, compass plants

• unwatchfulnesses
• unwater
• unwatered
• unwatering
• unwaters
• unwatery
• unwavering
• unwaveringly
• unwayed
• unweakened
• unweal
• unweals
• unweaned
• unweapon
• unweaponed
• unweaponing
• unweapons
• unwearable
• unweariable
• unweariably
• unwearied
• unweariedly
• unweary
• utterable
• utterableness