There are many different synonyms for the term "fairground attraction". Some possible options might include "carnival ride", "amusement park ride", "thrill ride", "roller coaster", or "funfair attraction". Other possible words that might be used to describe these types of rides could include "merry-go-round", "ferris wheel", "bumper cars", "haunted house", or "swing ride". Depending on the context or the specific type of ride being referenced, there are many other potential synonyms or related terms that could also be used. Ultimately, the best choice of synonym will depend on the particular nuances of the language being used and the intended meaning of the phrase.