According to Skeptical Science, the science community actually gave the term to deniers:

The term ‘climate change’ has been used frequently in the scientific literature for many decades, and the usage of both terms has increased over the past 40 years. Moreover, since the planet continues to warm, there is no reason to change the terminology. Perhaps the only individual to advocate the change was Frank Luntz, a Republican political strategist and global warming skeptic, who used focus group results to determine that the term ‘climate change’ is less frightening to the general public than ‘global warming’.