My motivation to ask this is to be able cover the needs of icons and alphanumeric characters of a website loading only one web-font.
EDIT: As suggested in a comment, I know services like icoMoon or Fontastic, where you can build your own icon collections. Actually two of icoMoon icon collections include alphanumeric icons. But this is not what I mean, since those alphanumeric icons are not supposed to be used to display the text of a website.
What I'd like to find is a text web font, for example Open Sans, that includes also an icon collection by typing some character combination.
With that web font I could type "car" to write this word, or also type something like
 to display the icon of a car.