Viable vs. Feasible
Another common one, viable, is often used when the word “feasible” would actually be much better suited to the sentence or situation. When we say that something is “viable,” we’re actually stating that it has the potential to survive. This comes from the French word “vie,” meaning “life,” as well as the Latin “vita,” which also means “life.”
Source: msn.com
If we want to say that something is simply possible, then “feasible” is the right word to use. So if you’re talking about a plan, a project, an idea, or a proposed course of action, feasible is always a better option than viable.