You can try this, though it's by negative implication:http://en.wikipedia.org/wiki/Tracking_(typography)
Tracking is commonly confused with kerning; however, tracking refers to the space between all the letters of a word, while kerning refers to the space between two individual letters. Tracking is measured in points. Positive or “loose” tracking is increased space between letters. Negative or “tight” tracking is decreased space.
In hand-set typography and older mechanized typesetting systems such a linotype, letterspacing is the practice of inserting same-sized spaces after each of the letters in a word: L E T T E R S P A C I N G. The size of the spaces chosen depended on the amount of space the letterspaced words needed to occupy.
Letterspacing is sometimes used on the Internet in an effort to confuse or defeat automated text-search systems or content-control software.
It gives several reasons why letterspacing is used in English, but never mentions using it for emphasis.
This source mentions how it is used in German, but never says it is used in English:http://en.wikipedia.org/wiki/Boldface
In Germany, a different means of emphasis was previously used. To achieve a variance in blackness, instead of making the letters darker, one would increase the spacing between them. This resulted in an effect reverse to boldface: the emphasized text becomes lighter than its environment. This was referred to as sperren in German ("letterspacing" in English), which could here be translated as "spacing out". While sperren normally means "to lock (out)", this particular meaning was figurative: with the older method of typesetting with letters of lead, the spacing would be achieved by inserting additional non-printing slices of metal between the types.
The reason for this particular German typographic convention can be seen in the traditional use of blackletter typefaces, for which boldface was not feasible, since the letters were very dark in their standard format. The blackletter typefaces were officially abolished in 1942 by Nazi Germany(see Antiqua-Fraktur dispute), and after that, its use quickly diminished. As a result, the use of spacing as a means of emphasis in printed materials quickly became obsolete. However, spacing is sometimes still used as a means of emphasis in typographic media where only one typeset is available, e.g. in typewritten communication or on text-only computer terminals.