Beneath is a preposition that means under, below, or beneath something else. There are several synonyms that can be used to convey the same meaning, including beneath, underneath, below, and under. Each of these words can be used interchangeably depending on the context and tone of the sentence. For instance, beneath is often more formal and literary than under, which is more commonly used in casual conversation. Similarly, underneath can be used to give emphasis to something that is hidden or concealed, while below can be utilized to refer to something that is positioned at a lower level. Overall, these synonyms offer nuances that can add depth and variety to writing and speech.