It's quite simple:

Which brings us to two different aspects of a similar term:

Something lawful can also be legal, if the contract is voluntary. Something legal may not be lawful, if it is imposed without previous well informed consent.

There you have.

All rebellion is lawful, and it should not be civil in any way! ;-)

There is no such thing as lawful rebellion. On the other hand Civil Disobedience is action without violence.

It happens all the time with government where non-compliance exceeds the benefit of violence against civilians. In other words the activity is actually better in action than the crime being prosecuted.

A great example is in South Africa where non-whites were hired against the rules of apartheid because the economy benefited from their skilled labor and there were not enough whites to fill the jobs.

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Theorizing or conceptualizing a phenomenon can be biased or determined by the point of view of each individual or community. So I will try to do the best I can since it is not my field or comfort zone.

Regarding Civil Rebellion, I found these two statements interesting:

"Public and violent uprising against the powers of the State, in order to overthrow them or force them to act in a certain way."

"In Civil Disobedience, Thoreau's basic premise is that a law superior to civil law demands the obedience of the individual. Human law and government are subordinate. In cases where both are in conflict with each other, the individual must follow his conscience and, if necessary, ignore human law."

In the case of Legal Rebellion I have not found a definition directly regarding this term, but I have found something that LEGALLY justifies A REBELLION

"In political philosophy, the right of rebellion, right of revolution or right of resistance to oppression is a right recognized to peoples against rulers of illegitimate origin, or that having legitimate origin have become illegitimate during their exercise, which authorizes civil or family disobedience and the use of force in order to overthrow them and replace them with governments that possess legitimacy. In another sense, it can be considered that it is the duty of the people of a nation to depose a government that acts against the common interest and/or that threatens the security of the people without any reason."

I have marked between (*) two terms that legalize a rebellion, RIGHT OF THE PEOPLE, DUTY OF THE PEOPLE

civil rebellion is internal to a nation and lawful rebellion can be internal or external.

Civil rebellion often uses “illegal “ acts of protest where lawful rebellion will try and use the law and legal grounds for protest.

Civil rebellion frequently confronts legality head-on, while lawful rebellion aims to operate within the confines of the law in order to defend rights or push back against perceived excess.