What's the noun for commercialism? Here's the word you're looking for.
commerce
(business) The exchange or buying and selling of commodities; especially the exchange of merchandise, on a large scale, between different places or communities; extended trade or traffic.
Social intercourse; the dealings of one person or class in society with another; familiarity.
“He detailed the bustling commerce at the site and described the thousands of shops that lined the boulevards around the sanctuary.”
“Whether you have any commerce with any of our old acquaintance among the Roman Catholic Privy Counsellors with you, or whether you enter with them into any of the affairs of this country, and what is fit for you to do towards them, you are the best judge.”
“Rumors of commerce between the president and that woman spread throughout the country.”
“He is not a social realist in the Mike Leigh or Ken Loach vein, nor is he a Hollywood-bound commercialist like Christopher Nolan, or an upper-crust merchant in the Merchant Ivory mould.”
“News organisations, no matter whether they're socialist or commercialist, have to attract audiences.”
“In the commercialist culture in which we live, has it become more about profit than prophecy?”