Deicer refers to any substance or tool that is used to remove ice or frost. There are a variety of synonyms for the term deicer, such as anti-icing agent, melting agent, defroster, and thawing solution. These words can be used interchangeably to describe anything that is able to eliminate ice buildup on various surfaces, including roadways, aircraft, and even windows. Other synonyms for deicer include ice melter, ice breaker, ice dissolver, and ice remover. Essentially, any term that describes a product or technique that helps to eliminate ice can be considered a synonym for the word deicer.