Which is why I prefer “Free Enterprise”.
FWIW, the term "capitalism" is generally attributed to Marx and Engels, though they didn't coin the term.
Marx used the term to describe the economic system that emerged from the industrial revolution, which he analyzed critically in works like Das Kapital.
Marx and Engels both used "capitalism" as a perjorative term to describe a system in which private owners control the means of production, and the creation of goods and services is driven by the pursuit of profit.
However, the word "capitalism" was in use prior to Marx. It was used in a less critical sense by Louis Blanc, a French socialist, in the 1840s, and Pierre-Joseph Proudhon, another early socialist thinker, used the term as well. These early references to "capitalism" described the system in a more neutral or descriptive way, referring to a society organized around capital and private ownership.
Marx’s use of the term, however, popularized it as a pejorative term for what he saw as an exploitative economic system based on class struggle between the bourgeoisie (capital owners) and the proletariat (workers).