Private Aviation VS Commercial: What is the Difference?

I was tasked with finding a single word to capture the contrast between private aviation and commercial aviation.
It was quite a challenge, considering the multitude of aspects to cover!
My enthusiasm for this field often compels me to talk endlessly about it when given the chance.
Nonetheless, I believe I did a decent job of summarizing the key disparity between flying commercially or on a private jet in just one word.
What, in your opinion, is the primary distinction? Share your thoughts in the comments!