There are various synonyms that can be used instead of desensitization such as callus, numbness, unfeelingness, insensitivity, and deadening. Callus refers to the toughened skin that develops over time due to repeated friction or pressure. Numbness is a loss of sensation or feeling in a particular area of the body. Unfeelingness refers to a lack of emotion or empathy. Insensitivity is the inability to feel, show, or respond to emotions or stimuli. Finally, deadening refers to the process of making something less powerful, intense, or effective. Each of these words can be used interchangeably with desensitization depending on the context.