Campaniliform is a unique word that describes something resembling a bell tower. However, if you're looking for synonyms to add variety to your writing, there are several options. For example, you could use the word steeple, which is commonly used to describe the tower or spire of a church. Another option is belfry, which refers to a tower or structure that houses bells. Additionally, you could use the word turret, which often refers to a small tower or dome-shaped structure. Finally, you could also use the phrase bell-shaped or bell-like to describe something that resembles a bell in shape or form.