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]
(..) down at the bottom... enclosed in glass, like a greenhouse. Nigger fell through that. Since then, he kind of developed a speech impediment. That's a damn shame. [Residents chattering indistinctly] But still, I have to say... you play with matches, (..)1994 Pulp Fiction