brainiac /brāˈni-ak/ (N Am inf)

An exceptionally intelligent person

• fastest
• Fastext
• fast food
• fast foods
• fast forward
• fast-forward
• fast-forwarded
• fast-forwarding
• fast-forwards
• fast-handed
• fasti
• fastidious
• fastidiously
• fastidiousness
• fastidiousnesses
• fastigiate
• fastigiated
• fastigium
• fastigiums
• fasting
• fastings
• fastish
• fast lane
• fast lanes
• fastly