Interminability is a challenging word to comprehend, especially when trying to communicate it to others. However, there are many synonyms that can help to convey similar meanings. Some of these include infinity, perpetuity, ceaselessness, boundlessness, and continuity. Other synonyms that can be used are unendingness, infinity, duration, endurance, and persistence. All of these words can be used to describe something that is endless, or seems to go on forever. Whether it is related to time or a situation, these synonyms can help to express the idea of interminability with more clarity and understanding.