interchangeably

— Traditionally, 'ticket office' seems to have been the preferred term in America, with Britain using the term 'booking office' (as an 1881 edition of The Railway Age Monthly and Railway Service Magazine explains). Today, the two are often used interchangeably (as the recent 'Save our ticket offices' campaign shows), with the term 'ticketing' perhaps capturing more of the point-of-sale transaction and issuing of tickets within stations.