Main thing
Primary and main thing are semantically related in principal topic. In some cases you can use "Primary" instead a noun phrase "Main thing".
Primary
Primary noun - A preliminary election where delegates or nominees are chosen.
Main thing and primary are semantically related in principal topic. Sometimes you can use "Main thing" instead a noun "Primary".
Cite this Source
Primary and Main thing. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/main_thing/primary
Main thing & Primary. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/main_thing/primary>.
Primary or Main thing. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/main_thing/primary.
Google Ngram Viewer shows how "main thing" and "primary" have occurred on timeline