Compulsory
Compulsory adjective - Forcing one's compliance or participation by or as if by law.
Key and compulsory are semantically related. In some cases you can use "Key" instead an adjective "Compulsory".
Nearby Words: compulsion, compulsive
Key
Key adjective - Coming before all others in importance.
Compulsory and key are semantically related. Sometimes you can use "Compulsory" instead an adjective "Key".
Mutual synonyms
Related pairs
Both words in one sentence
- All you need to know is that in the fortnight following the death of Princess Diana, his radio station (Manchester Key 103) capitulated straight away, took him off air and sent him on compulsory holiday for fear of the things he might say.
Source: Shock Jock
Cite this Source
Key and Compulsory. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/compulsory/key
Compulsory & Key. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/compulsory/key>.
Key or Compulsory. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/compulsory/key.
Google Ngram Viewer shows how "compulsory" and "key" have occurred on timeline