Reactionary is a term used to describe someone who opposes progressive or liberal changes. Some synonyms for the word "reactionary" include conservative, traditionalist, archaic, old fashioned, regressive and retrogressive. These words are often used to describe individuals or groups with a strong attachment to traditional values and a resistance to societal advancements. People who are considered to be reactionary often fear change and prefer the status quo. They may view new ideas, technology and societal norms as a threat to their familiar way of life. It's important to note that not all conservatives or traditionalists are necessarily reactionary, and that the usage of these terms can be subjective and dependent on context.