Categorical Difference Between 'street', 'boulevard' and 'avenue'
Apparently ''street'', ''avenue'', ''boulevard'' and other designations of the ''road'' commonly used to specify a street address, are not synonyms. They emerge in one specific content and literally separate their child objects rather than simply substitute each other. Thus they aren't synonyms, but what are they?
Such ''split categories'' are present in different languages and seem to be very natural and common. An ''officer'', an ''engineer'', a ''manager'', a ''worker'' and so forth categories under particular circumstances could separate working (even in one company) people not by ''rank'', but by some often pretty blurred definition of their place of work and/or duties. What are such things?
(Transferred from old LINGUIST List Ask-a-Linguist site)