Coining new jargon words (neologisms) is an alternative to formulating unusually precise meanings of commonly-heard words when one needs to convey a specific meaning.

A Marxist may use the term "surplus value" to specifically mean the difference between a worker's productivity and wage. If they say "surplus value" to someone who does not recognize this specific meaning, that person may think the Marxist means "surplus" in the sense of "unnecessary excess". They may think the Marxist means that the worker's productivity is wasted, and respond accordingly. This may baffle the Marxist, who will point out that "surplus value" (in their sense) doesn't have much to do with "overproduction" (another word that has a specific meaning in Marxist economics).

Using neologisms has the advantage that it conveys readily, to someone unfamiliar with the neologism, that they are unfamiliar with it and need to ask for clarification. Using existing words with unusually precise meanings runs the risk of letting someone go past a misunderstood word without realizing that they are doing so.