cofactor /kō-fakˈtər/

1. A factor which occurs along with other factors in multiplication
2. A nonprotein organic molecule or a metallic ion that binds with an enzyme and is essential to the enzyme's activity (biology)

• in a class on its own
• in a cleft stick
• in a cold sweat
• inaction
• inactions
• inactivate
• inactivated
• inactivates
• inactivating
• inactivation
• inactivations
• inactive
• inactively
• inactivities
• inactivity
• in actual fact
• inadaptable
• inadaptation
• inadaptations
• inadaptive
• in a daze
• in addition
• in addition to
• inadequacies
• inadequacy