brainiac /brāˈni-ak/ (N Am inf)

An exceptionally intelligent person

• stockfishes
• stock-gillyflower
• stock-gillyflowers
• stockholder
• stockholders
• Stockholm syndrome
• stockhorn
• stockhorse
• stockhorses
• stockier
• stockiest
• stockily
• stockiness
• stockinesses
• stockinet
• stockinets
• stockinette
• stockinettes
• stockinette stitch
• stockinette stitches
• stocking
• stocking cap
• stocking caps
• stockinged
• stockinger