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

• barrenest
• barrenness
• barrennesses
• barrens
• barren strawberry
• barrenwort
• blackberryings
• black bile
• black bindweed
• blackbird
• blackbirder
• blackbirders
• blackbirding
• blackbirdings
• blackbirds
• blackboard
• blackboards
• black bodies
• black-boding
• black body
• black body radiation
• black body temperature
• black book
• black books
• black bottom