Deeprooted is a term that describes a belief, emotion or habit that is firmly established and difficult to change. There are a number of synonyms that can be used in place of deeprooted, depending on the context and tone of a sentence. For example, some people might use the word ingrained to refer to a deeprooted habit, while others might use the terms entrenched or fixed. In some cases, the term immovable might be used to describe a deeprooted belief or emotion that cannot be changed. Ultimately, the choice of synonym will depend on the specific context and the writer or speaker's personal preferences.