Materialists, atheists, and darwinists generally refuse to deal with creation at all as it is it is often conjoined by materialism and pantheism, thus it generally is asserted by the materialist that it can be called, creatio ex materia. This requires the materialist to to 'redefine' the term creation to not hold to it original meaning of 'coming into being', but they have adopted the exchange of the term 'formation' for creation. This seems to be the place which you find yourself.
For myself I prefer to approach the subject by means of actual terms of meaning and with the use of science, logic, reason, and rational thought. Atheist materialists often attempt to champion those tools of logic, reason, science, and rational thought. If you are agreed let us begin to discuss 'the subject of creation' which you brought up.
Do you agree with these definitions? How do you define Creationism?