a.dont-jump-around-on-hover {
  display: block;

  &:after {
    display: block;
    content: attr(name);
    font-weight: 700;
    height: 1px;
    color: transparent;
    overflow: hidden;
    visibility: hidden;
  }
}


<a class="dont-jump-around-on-hover" href="" name="Downloads">Downloads</a>