biform /bīˈförm/

Having two forms

• cold turkey
• cold war
• common school
• common schools
• common seal
• common seals
• common sense
• commonsense
• commonsensical
• Common Serjeant
• common-shore
• common sorrel
• common stair
• common stairs
• common stock
• common stocks
• common time
• common times
• common vestry
• common viper
• common weal
• commonweal
• commonweals
• commonwealth
• Commonwealth Day