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

• outbred
• outbreed
• outbreeding
• outbreedings
• outbreeds
• outbroke
• outbroken
• outbuilding
• outbuildings
• outburn
• outburned
• outburning
• outburns
• outburnt
• outburst
• outbursting
• outbursts
• outby
• outbye
• outcast
• outcaste
• outcasted
• outcastes
• outcasting
• outcasts