Cognitive and cultural embeddedness: combining institutional economics and economic sociology
According to this, pederasty is sexual relations between two males, especially when one of them is a minor. Other definitions, like the one that JSBangs found, differ slightly. But otherwise, I think you answered the question yourself: pedophile refers to the attraction, while pederasty refers to the act itself.
Pimples, 'zits' Dermatology A general term for a primarily pubertal condition characterized by local inflammation of the pilosebaceous unit of the face, upper back and shoulders due to keratinaceous plugging of the sebaceous glands at the base of hair follicles. See Acne arthritis, Acne vulgaris, Cystic acne.