An Appellative is one that signifies a common substance, as man, horse. An Adjective noun is one that is applied homonymously to proper or appellative nouns, and signifies either praise or blame. It is derived from three sources, from the soul, the body, and external things: from the soul, as sage, licentious; from the body, as swift, slow; from external things, as rich, poor.
Source: wiktionary