Hammers in to is a phrase commonly used to describe forcefully inserting or impressing an idea in someone's mind. There are many synonyms that can be used to convey a similar meaning, depending on the context. Some synonyms for hammers in to include pound, drive, push, force, impress, engrave, stamp, implant, ingrain, instill, embed, and inculcate. These words can be used to describe actions such as pushing an idea through persistent persuasion, forcefully impressing a belief in someone's mind, or embedding a concept in someone's memory through consistent repetition. The phrase hammers in to has a strong connotation of force and persistence, and its synonyms can be used to convey similar meanings in varying degrees.