All powers of the city shall be vested in and all matters of policy of the city shall be exercised and determined by a Council of seven (7) members. In all cases where the word “Council” is used in this charter, the same shall mean and shall be synonymous with the terms “commission,” “common council,” “board of aldermen,” “governing body,” “legislative body” or any other synonymous term, as the same may be used in any state or Federal law in referring to legislative or governing bodies of cities.