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]
(..) cried when the young lovers died in each other's arms. I ran off and joined them the next day, never looked back. You're very good. My final speech is shit. But to be fair to myself, which I always like to be, the writing's no good. So change it. It would all just be farting, (..)2016 TvShow: Game of Thrones Title: Blood of My Blood Season: 6 Episode 6