Not sure if this helps or will go anywhere but the pedant in me wishes to talk.
Being pedantic about language outside of context is of little use, I think. But even within
a very specific context, the meaning of words vary subtly from person to person, which the quoted examples were intended to show.
I agree that English is a great language. It's probably the most progressive language in the world, in the sense that it contains more words and fewer rules for how to use them than other languages.
As for this thread though, I don't think it's going anywhere. There is no point debating the meaning of a word unless you need to define it in a precise way in order to communicate something specific. And this particular debate doesn't seem to beabout
anything other than atheists and theists defining "belief" in slightly different ways in order to feel better about their own position.