As with everything else an Easement and Right of Way have the same meaning but are some times different. Both give the grantee the right to use some portion of your land for what ever purpose you have granted the easement for.
Sometime when the term Right of way is used it can also mean that the property is sold to the grantee for a price and is no longer yours. In this case the new owner can do with it as he pleases. An example is a utility easement is granted to construct\maintain utility systems and can't be used for any other purpose and should it no longer be need by the utility company the land is still the grantor's property.
Whereas a Right of way that is sold to a utility is owned by the utility and can be sold to or used for any purpose that they want . Also when they no longer need the land for their use they can sell it to whom ever they wish for what ever purpose or just keep it.
Most Railroads were built on Right of ways thus the deeding over to various groups to make walking and bike riding tracks out of old rail lines.