The problem is that the term "Darwinism" was coined by creationists to bash the theory of evolution. This is just like the term "pro-choice" was invented by abortionists to bash people against killing babies. One has to look at the origin to see the background meaning.
Darwinist seems to be in current usage by others besides the creationists.
“Definitions of darwinism on the Web:
a theory of organic evolution claiming that new species arise and are perpetuated by natural selection
wordnet.princeton.edu/perl/webwn
Darwinism is a term used for various different movements or concepts related to a greater or lesser extent to Charles Darwin’s work on evolution. The meaning of Darwinism has changed over time, and depends on who is using the term.
en.wikipedia.org/wiki/Darwinism
The principles of natural selection set out by Charles Darwin in the Origin of Species (1859) and other writings; The evolution and common ...
en.wiktionary.org/wiki/Darwinism”
And how does the term “Darwinist” bash evolution when Darwin is credited with the soul of evolution, natural selection? Darwin is rightly termed “the father of evolution” is he not?
Global warming went to climate change when the warming wasn’t so warm, So now is Darwin going to be ejected?
There’s more to it then simply, “Oh the creationists use the term ‘Darwinist’ so Darwinian, Darwinist, has to go”.