Freedom of speech and First amendment

Freedom of speech noun - A civil right guaranteed by the First Amendment to the US Constitution.

First amendment and freedom of speech are semantically related In some cases you can use "First amendment" instead a noun phrase "Freedom of speech".

First amendment noun - An amendment to the Constitution of the United States guaranteeing the right of free expression; includes freedom of assembly and freedom of the press and freedom of religion and freedom of speech.

Freedom of speech and first amendment are semantically related in right to express uncensored opinions topic. You can use "Freedom of speech" instead a noun phrase "First amendment".