I only have surface-level knowledge of any of these things, but I don't think most people would consider a defeated slave rebellion or a war of independence as "revolutions"
As for the other two ... maybe the people of those countries would have endured less suffering afterwards if they had reformed rather than revolted?
The war of independence the 13 American colonies waged against Britain is generally called "The American Revolution", but yes, for some reason most other wars of independence aren't called revolutions -- for instance while there was a Mexican revolution in the early 20th century, the earlier war of independence against Spain is just called the "Mexican war of independence" (Guerra de Independencia de México)
