As an alternative is a common phrase used to suggest an alternative option to a particular course of action. However, there are several other synonyms that can be used to express the same meaning. One of the substitutes is "instead," which suggests that a different option is being preferred over the original one. Another alternative is "as another option," which conveys the idea that there are multiple choices. "Alternatively" is another term that can be used as a substitute, implying a backup option or a different approach. Additionally, "in lieu of" can also be used to suggest a substitute choice instead of a proposed action.