Calling God Creator (Khāliq) or Originator (Mukawwin) is not treated simply as an arbitrary label. Advocates of a real attribute of takwīn argue that a derived name points to its appropriate basis: knowing to knowledge, being powerful to power, and creating to creation or takwīn.
Such derivation does not establish bodily motion in God. The basis of derivation means the reality in virtue of which the name is correctly used.
The disagreement is whether power and will suffice for the name Creator or whether a further real attribute of takwīn is affirmed.