Mainstream and Plebeian

Mainstream noun - The prevailing current of thought.

Plebeian and mainstream are semantically related. In some cases you can use "Plebeian" instead an adjective "Mainstream".

Plebeian adjective - Belonging to the class of people of low social or economic rank.

Mainstream and plebeian are semantically related. Sometimes you can use "Mainstream" instead an adjective "Plebeian".