I fully agree with the importance of recognizing and commemorating the resistance to slavery by almost all enslaved African Americans and also many white Americans. The Underground Railroad was an important part of the overall Resistance to Slavery Movement.
I feel that it is important to define the various parts of the resistance movement in order to better understand and teach the total history of resistance to slavery.

Examples:

1. Slave Rebellions were a part of the resistance to slavery movement. Is it accurate to portray those actions as part of the Underground Railroad or visa versa?

2. It is pretty well established that Native Americans aided some enslaved African Americans to escape to freedom and remain free. Is it accurate to portray these activities as Underground Railroad or visa versa?

3. Henry “Box” Jackson had himself nailed into a crate and was shipped to freedom. This certainly displayed ingenuity on the part of Henry “Box” Jackson and those who helped him, but was this act of resistance a part of the Underground?

To all of the above questions, I think the answer is no! While the Underground Railroad was not an organization according to the laws of incorporation, it definitely was organized. In my view, the definition of the Underground Railroad should be something like this:

The Underground Railroad - [ An organized group of anti-slavery activists in United States history who operated from around 1812-1861; represented by some members from all the social strata of American society, who systematically engaged in aiding escaping enslaved African Americans elude capture in the United States on their journeys in to freedom in foreign countries, most notably Canada.]

In my view, defining the function of the Underground Railroad does not in any way diminish the importance of the larger scope of the Resistance Movement, of which the Underground Railroad was a part.

An atom is a component of a molecule, but it is not accurate to describe an atom as a molecule or visa versa. This would create confusion and chaos in a chemical formula. This principle is also true when defining elements of historical significance.