ANSWERS 1: Complement: Complete something else Compliment: Express admiration 2: Principal: main or primary Principle: Rules or standards 3: Effect and Affect: While affect is used as verb, effect is used as a noun. Both of them mean having an influence on something.
ANSWERS 4: Device: a machine or tool Devise: plan or invent 5: Capitol: Houses legislative members Capital: Capital letter or a capital city