In the first sentence 'cabal' which means ‘a small group of secret plotters, as against a government or person in authority' is correct. In the second sentence ‘bailing’ would be the correct word as it means 'to dip (water) out of a boat'. ‘Baling’ means to make into bales (bundles or packages)'. ‘Magnate’ would be appropriate for the third sentence as it means ‘a person of rank, power, influence, or distinction often in a specified area'. In the last sentence the correct word would be ‘timbre’ which means ‘the quality of tone distinctive of a particular singing voice or musical instalment'.