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