一部【いちぶ】
one part, one portion, one section, some, one copy (e.g. of a document)
幹部【かんぶ】
management, (executive) staff, leaders, leadership, top brass, upper echelons
本部【ほんぶ】
headquarters, head office, main office
部長【ぶちょう】
head (chief, director) of a section or department, head of a (school) club, head of a (school) team
部分【ぶぶん】
portion, section, part
部門【ぶもん】
division (of a larger group), branch, field, class (subclass), group, category, department
内部【ないぶ】
interior, inside, internal
学部【がくぶ】
department of a university, undergraduate (course, program, etc.)
部屋【へや】
room, chamber, apartment, flat, pad, stable
部隊【ぶたい】
force, unit, corps, squad, troops, party
全部【ぜんぶ】
all, entire, whole, altogether
部品【ぶひん】
parts, accessories, components
文部省【もんぶしょう】
Ministry of Education, Science and Culture (1871-2001)
支部【しぶ】
branch, subdivision
北部【ほくぶ】
northern part, the north (of a region)
南部【なんぶ】
southern part, the south (of a region)
西部【せいぶ】
western part, the west (of a region), the West (United States)
東部【とうぶ】
eastern part, the east (of a region)
外部【がいぶ】
outside (e.g. of a building), exterior, outside (of a group, company, etc.), outside world
大部分【だいぶぶん】
most part, greater part, majority