The term "was sequence" can be replaced by a several synonyms. A few of the possible synonyms are "past series", "former progression", "previously ordered set", "prior arrangement", and "earlier succession". Each of these terms has a similar meaning to "was sequence" and can be used interchangeably in certain contexts. Whether discussing a series of events that has already occurred or working on programming code, any of these synonyms could be used to describe a sequence of actions that have taken place in the past. Having a variety of synonyms to use can help break up repetition and improve the flow of written or spoken language.