Novelizing is a term that refers to transforming an existing piece of work, such as a screenplay or a play, into a novel form. However, there are other synonyms that can be used instead such as adapting, fictionalizing, or transmuting. Adapting involves modifying or adjusting an existing work to suit a novel format, while fictionalizing involves creating a new fictionalized version of an existing work. Transmuting, on the other hand, involves transforming something into a different form altogether. Each of these synonyms conveys the idea of transforming an existing work into a novel form, with subtly different shades of meaning.