Rubberize is a term used to refer to the process of coating or converting a material into rubber-like form. However, there are several synonyms that can be used in place of rubberize such as vulcanize, elasticize, plasticize, and polymerize. Vulcanize refers to the process of treating rubber with sulfur or other substances to improve its physical properties. Elasticize can be used to describe the process of making a material stretchy and flexible. Plasticize is often used to describe the process of adding plasticity or flexibility to something. Polymerize is the process of combining small molecules to form larger ones, resulting in a rubber-like material. These synonyms provide different shades and nuances of meaning that can be used to add variety to our language.