Anomaly
Anomaly noun - Something that is different from what is ordinary or expected.
Unusual occurrence and anomaly are semantically related. In some cases you can use "Unusual occurrence" instead a noun "Anomaly".
Unusual occurrence
Anomaly and unusual occurrence are semantically related. You can use "Anomaly" instead a noun phrase "Unusual occurrence".
Cite this Source
Unusual occurrence and Anomaly. (2016). Retrieved 2026, August 11, from https://thesaurus.plus/related/anomaly/unusual_occurrence
Anomaly & Unusual occurrence. N.p., 2016. Web. 11 Aug. 2026. <https://thesaurus.plus/related/anomaly/unusual_occurrence>.
Unusual occurrence or Anomaly. 2016. Accessed August 11, 2026. https://thesaurus.plus/related/anomaly/unusual_occurrence.
Google Ngram Viewer shows how "anomaly" and "unusual occurrence" have occurred on timeline