I only said one of them.
Most people think of "The theory of Evolution" or "Evolutionary Theory".
And they link both with the understanding of a totally natural explanation of how life formed on earth. As do most sources of information on the subject.
Darwin implied it as well.
Well, yea. When scientists talk freely of 'evolution' or 'the theory of evolution' without a qualifier, they mean the theory of common descent (i.e., "the theory that all life descended from a single common ancestor, with biodiversity arising from evolution by natural selection", where 'evolution' means 'allele frequency change in a population over time').
If they're being technically correct (as one must be around Creationist, since they think a typo is an admission of guilt), then 'evolution' refers to the aforementioned allele change, or they'll specifically mention the theory.
It's not difficult. As I've already demonstrated, this system of nomenclature is the norm in science, and, indeed, among most laymen. There are niche alternative uses for 'evolution', mostly referring to some gradual change such as nuclear synthesis, but evolution proper is what I said above.
Don't conflate chemical evolution (i.e., nuclear synthesis in novae) and abiogenesis (i.e., the chemical origin of the first 'living' systems, or systems ancestral to life) with biological evolution, especially since that is specifically what we're talking about.