Words from
nominal
    stated or expressed but not necessarily corresponding exactly to the real value.
    
    Source: Zen and the Art of Motorcycle Maintenance - Robert M. Pirsig
    
    egotism
    excessive concern with oneself; selfishness.
    
    Source: Zen and the Art of Motorcycle Maintenance - Robert M. Pirsig
    
    argot
    specialized vocabulary used by a group of people, especially those of a particular trade or profession; jargon.
    
    Source: Zen and the Art of Motorcycle Maintenance - Robert M. Pirsig
    
    referent
    a thing or person to which a word, phrase, or symbol refers.
    
    Source: Zen and the Art of Motorcycle Maintenance - Robert M. Pirsig