Difference Between Fact and Theory
English has a vocabulary of thousands of words and we can expect this language to boast of ways to express different concepts. There are many well-known examples, indeed, for multiple descriptions for the same idea or item. Also, in addition to the diversity resulting from the history of linguistic hybridization, English has the tendency to assimilate words from other languages too.
Science is certainly no exception. When it comes to some of the most fundamental concepts in science, there is no dearth of numerous terminologies.