Journalists and other writers are encouraged to avoid tiresome repetition of words by employing what’s known as elegant variation, the use of synonyms to make prose less of a trudge. This can sometimes be taken to preposterous extremes of course, as in the Guardian’s fondly remembered “popular orange vegetable”.
And still it goes on. One would have thought that a recent court case in Edinburgh, in which an unfortunate gentleman had part of his tongue bitten off by a woman, and then saw the morsel snatched away by a seagull, might have been exciting enough as it stood. But no, the writer and/or the sub-editor (if the Edinburgh Evening News can still afford such fripperies) decided that on a second mention the body part had to become “the fleshy muscle”.