The word atomiferous refers to something that produces or contains atoms. However, if you are looking for alternative words to use in your writing, there are several options available. Some synonyms that you may consider include atomical, atomic, or atomized. These words all relate to the presence or creation of atoms in some form. Additionally, you may choose to use more general terms, such as elemental or molecular, which encompass a broader range of scientific concepts. Ultimately, the word you choose will depend on the context of your writing, but all of these options offer effective alternatives to the word atomiferous.