Atomic reactor and Piles

Atomic reactor noun - A nuclear reactor that uses controlled nuclear fission to generate energy.

Piles is a synonym for atomic reactor. In some cases you can replace term "Piles" with "Atomic reactor", this terms are similar.

Piles noun - A large number or amount.

Atomic reactor is a synonym for piles. Sometimes you can use "Atomic reactor" instead a noun "Piles".