When generalized statements are made for all the morphemes in which a particular alternation occurs, we may have certain morphemes which are referred to in more than one statement, i.e. morphemes whose alternant members can be described as the result of more than one general phonemic alternation. Thus before {'ous'}, {'odium'} has a member without the /Əm/ ('odious'), while {'outrage'} has a member with pre-suffixal stress ('outrageous'). In {'decorum'} we have yet a third alternation, in the member /dƏ'kor/ which occurs in decorus (and in 'decor'). But this alternation can be described as merely the result of the operation of both of the two previous ones: dropping of /Əm/ and changing of stress. We can state this by incliding {'decorum'} both in the list which contains {'odium'} and in that which contains {'outrage'}.
- Harris (1951), a pag.226