When trying to convey certainty and finality in a decision or assessment, "ruled-out" can be a very useful term. However, it may become repetitive or lose impact if overused. To expand your vocabulary, consider alternative phrases with similar meanings, such as "eliminated", "rejected", "disqualified", "dismissed", "excluded", "invalidated", "negated" or "discarded". Each of these terms carries a strong sense of closure or determination, and can add depth and nuance to your language. Depending on the context, one may be a more appropriate choice than another, so it is worth exploring all of them to find the right fit for your writing or speech.