They're still used, but they sound a bit historical outside of specific contexts such as ... simper in written fiction, adoration in Catholicism, interlocutor i

They're still used, but they sound a bit historical outside of specific contexts such as ... simper in written fiction, adoration in Catholicism, interlocutor in learning about language and communication, amorous to describe the nature of an adult relationship or activity in a way that's humorously obvious but safe for work. A French author studying communication and writing in English could reasonably encounter all of them multiple times. https://books.google.com/ngrams/graph?content=simper%2Cadoration%2Camorous%2Cinterlocutor%2Cput+on+airs&year_start=1500&year_end=2019&corpus=en-2019&smoothing=3&case_insensitive=true https://books.google.com/ngrams/graph?content=simper%2Cadora...