Icon names without trailing stars already exist in the freedesktop.org icon naming specification.
Icons that are in the spec, but not yet in Oxygen's animations/ so they need to be added. Description taken from the specification.
process-working This is the standard spinner animation for web browsers and file managers to show that the location is loading. This image should be a multi-frame PNG with the frames as the size that the directory containing the image, is specified to be in. The first frame of the animation should be used for the resting state of the animation.