ABSTRACT
A word that belongs to several parts of speech is a conversional word. The treatment of conversional words and homographs is interrelated. Strictly speaking, a conversional word refers to the same generalization word that has concurrently different parts of speech; therefore, only A belongs to conversional words. The same generalization word that has the properties of several parts of speech is not necessarily treated as a conversional word in its narrow sense. Whether or not it is treated as a conversional word has something to do with the strategy for classifying parts of speech. The advantage of the priority homomorphic strategy is that there are no conversional words, and that there are not a large number of parts of speech. Its disadvantage is that there is no entire one-to-one correspondence between a part of speech and its properties.
