Just as there are trends with clothing and food and music and entertainment, so there are fashions with words. I am sure that this is not just in my own head. Two words that I have noticed creeping into regular use from obscurity are "diaspora" and "trope". Here I am thinking about talk radio and intelligent debate - not about exchanges in the local pub or the market.
diaspora - is a scattered population whose origin lies in a separate geographic locale. In particular, diaspora has come to refer to involuntary mass dispersions of a population from its indigenous territories, most notably the expulsion of Jews from the Land of Israel (known as the Jewish diaspora) and the fleeing of Greeks after the fall of Constantinople. Other examples are the African transatlantic slave trade, the Palestinian diaspora, the southern Chinese or Indians during the coolie trade, the Irish during and after the Irish Famine. (My thanks to Wikipedia for this)
The term comes from the Greek word diaspeirein - which means to disperse or scatter.
When war broke out in their home country, a diaspora of refugees settled in a neighbouring nation.
The Romans were responsible for the Jewish diaspora when they drove them from their homeland.
The African diaspora in the Americas was due, almost entirely, to slavery.
trope - something such as an idea, phrase, or image that is often used in a particular artist's work or in a particular type of art. In more recent times the word often refers to a well-used cliché or motif in political rhetoric.
The term comes from the Greek word tropos meaning turn or way.
Using the word "trope":-
Trump's suggestion that the Congresswomen should "go back where they came from" is a typically racist trope.
Have you noticed any other "fashionable" words rising to the fore? Please do tell.