Non-germane, which means irrelevant or unrelated, has a few antonyms that can be used in different contexts. One of the antonyms for non-germane is relevant, which implies that something is closely linked, pertinent or applicable to the matter at hand. On the other hand, another antonym is significant, which means of great importance, weight or consequence, and may apply to something that has a direct impact on the outcome of a situation. Yet another antonym is related, which suggests that something is connected or associated with another thing in some way. All these antonyms provide a different perspective to the idea of non-germane and can be useful in different situations.