Key
Key adjective - Coming before all others in importance.
Productive and key are semantically related. In some cases you can use "Productive" instead an adjective "Key".
Productive
Productive adjective - Having a role in deciding something's final form.
Key and productive are semantically related. Sometimes you can use "Key" instead an adjective "Productive".
Cite this Source
Productive and Key. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/key/productive
Key & Productive. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/key/productive>.
Productive or Key. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/key/productive.
Google Ngram Viewer shows how "key" and "productive" have occurred on timeline