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

• ritzy
• riva
• rivage
• rivages
• rival
• rivaled
• rivaless
• rivalesses
• rival-hating
• rivaling
• rivalise
• rivalised
• rivalises
• rivalising
• rivalities
• rivality
• rivalize
• rivalized
• rivalizes
• rivalizing
• rivalled
• rivalless
• rivalling
• rivalries
• rivalrous