The term 'Degrease' means to clean or remove grease/oil from the surface of an object. When it comes to synonyms, there are numerous substitute words for 'Degrease' that are commonly used for the same purpose. Some of the synonyms are 'decontaminate', 'purify', 'sanitize', 'deterge', 'cleanse', 'scrub', 'disinfect', 'sterilize', 'wash', and 'purge'. All of these words imply the same meaning in that they aim to remove grease or oil from a surface. Choosing the right synonym depends on the context of the usage, but one can use any of these words with confidence as they are interchangeable as per the situation.