[html] how to bold words within a paragraph in HTML/CSS?

if you want to just "bold", Mike Hofer's answer is mostly correct.

but notice that the tag bolds its contents by default, but you can change this behavior using css, example:

p strong {
    font-weight: normal;
    font-style: italic;
}

Now your "bold" is italic :)

So, try to use tags by its meaning, not by its default style.