Historically we find the terms 'intellectualism' and 'sensationalism' used as synonyms of 'rationalism' and 'empiricism.'

They might almost be used as synonyms for "hard working" on the labor level.)

The names Dakota and Sioux are used as synonyms and the English significance instead of the Indian cognomens.

As pretty much everyone knows (except maybe children until they find out) there are a handful of words commonly used as synonyms for 'women'.