They fought for 'freedom of speech'. = They fought for the right to/of 'free speech'. [=they fought for the legal right to express their opinions freely]
He kept revising his 'speech' [=the words that he had written for his speech] right up until the last minute.
She thanked us in her 'acceptance speech'. [=a speech given by someone receiving an award or prize]
(..) ... can tell you the truth about Harvey Dent. He could... But I-I'll let 'im tell you himself. Commissioner Gordon! The truth? I have... written a speech... telling the truth about Harvey Dent. Maybe the time isn't right. Maybe right now... all you need to know is that there are... (..)2012 The Dark Knight Rises