一部【いちぶ】
one part, one portion, one section, some, one copy (e.g. of a document)
部長【ぶちょう】
head (chief, director) of a section or department, head of a (school) club, head of a (school) team
部門【ぶもん】
division (of a larger group), branch, field, class (subclass), group, category, department
本部【ほんぶ】
headquarters, head office, main office
部分【ぶぶん】
portion, section, part
幹部【かんぶ】
management, (executive) staff, leaders, leadership, top brass, upper echelons
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)
全部【ぜんぶ】
all, entire, whole, altogether
部品【ぶひん】
parts, accessories, components
支部【しぶ】
branch, subdivision
南部【なんぶ】
southern part, the south (of a region)
北部【ほくぶ】
northern part, the north (of a region)
外部【がいぶ】
outside (e.g. of a building), exterior, outside (of a group, company, etc.), outside world
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)
大部分【だいぶぶん】
most part, greater part, majority