Oneways are phrases or sentences that only go in one direction, either from one point to another or from one person to another. Synonyms for oneways can include unidirectional, single-track, one-shot, and linear. Unidirectional refers to movement or energy that only goes in one direction, such as a river flowing downstream. Single-track suggests a system that only operates in one direction, such as a one-way street. One-shot could refer to a single-use item that is disposable or a one-time opportunity. Linear indicates a progression that only moves forward in one direction, such as a timeline or a story plot. All these words convey the idea of only moving forward without the possibility of turning back.