The phrase "in practice" is often used to describe something that is actually happening or occurring, as opposed to something that is merely theoretical or hypothetical. However, there are many other words and phrases that can be used to convey a similar meaning. For example, one could say "in action," "in use," "in operation," or "in implementation." Similarly, words like "applied," "practiced," and "utilized" can all be used to describe things that are being put into practice or in use. Ultimately, the choice of synonyms will depend on the context and the speaker's intended meaning.