Ultrabold

Many commercial typefaces come in an "ultrabold" or "heavy bold" weight that is even larger than the regular bold available on the Mac. You can create ultrabold lettering in MacPaint as follows […]

In England, a classification standard has been developed that contains eight weights: extralight, light, semilight, medium, semibold, bold, extrabold, and ultrabold.

In Frutiger LT, for instance, the lowercase a of the regular font features a rather round curve terminal compared to a fairly flat one in the ultrabold font.