Competition law is the general term for the body of law regulating the market behaviour of corporate and business entities and industrial organisations and structures, so as to preserve competition for the benefit of consumers.
Consumer protection is the protection of consumers against misleading and deceptive statements or conduct by suppliers: for example, under the Australian Consumer Law, which replaces the (CTH) Trade Practices Act 1974 s 4B, Pt V.
Australian Consumer Law - A single, national consumer protection and product liability regime applying federally as a law of the Commonwealth pursuant to Pt XI Sch 2 of the (CTH) Competition and Consumer Act 2010 and pursuant to equivalent uniform application laws of the participating States and Territories.
(From the Encyclopaedic Australian Legal Dictionary)
Some alternative terms: