The word "urb" is informal slang for "urban." It typically refers to the characteristics of cities or the lifestyles of city-dwellers. There are a variety of synonyms for this word, including "metro," "urbane," "cosmopolitan," "citified," and "cityfied." Each of these words conveys a slightly different nuance or aspect of urban life. For example, "metro" suggests a bustling, fast-paced environment, while "urbane" connotes sophistication and refinement. "Cosmopolitan" emphasizes the diversity and international character of urban centers, while "cityfied" implies a sense of being ingrained or adapted to city life. Whatever word is chosen, they all convey the idea of city living and urbanization.