Quoting Cody G
Do you know what always baffled me? How come Doc is the only dwarf whose name isn't an adjective?
Doc & doctor can be also used as an adjective as in the name of a medical center in my neighborhood---DOC Care! What kind of care? DOC care!
Nouns can be used as an adjective as all the dwarves names are not only adjectives but once applied to them as names - nouns! Remember nouns NAME! I was an ESL teacher!