What is the difference between 北 and 北部


What is the main difference between 北 and 北部? I heard that's words that
contain 2 kanji sounds more polite, but not sure that it's the current
situation.




北 is the cardinal direction "north".  
北部 is a combination of 北(north) and 部(part), and refers to the northern
region/section/area of a landmass.




北 is the cardinal direction "north".  
北部 is a combination of 北(north) and 部(part), and refers to the northern
region/section/area of a landmass.

