As "cronerwstone" is an unusual or perhaps made-up term, it's difficult to provide exact synonyms. However, if we were to guess at possible meanings and come up with synonyms based on those assumptions:
If "cronerwstone" were some kind of unique object or artifact, possible synonyms could be "curio", "relic", or "oddity". For example, "The cronerwstone was a rare curio that fascinated collectors."
If it were a place name, words like "locality", "spot", or "area" could be considered as loose synonyms. For instance, "The cronerwstone is a secluded spot that few people know about."
If it were a concept or idea, terms such as "notion", "conceptualization", or "idea" might work. "The cronerwstone represents a unique notion in modern philosophy."
Since we don't know the specific meaning of "cronerwstone", these are just speculative synonyms that try to capture different possible interpretations.