- 门(mén): gate; doo; gateway; doorway; opening; valve; switch; way to do something; knack; family; house; (religious) sect; school (of thought); class; category; phylum or division (taxonomy); classifier for large guns; classifier for lessons, subjects, branches of technologyr; CL: 個|个(gè), 扇(shàn)
- 部门(bù mén): department; branch; section; division; CL: 個|个(gè)
- 窍门(qiào mén): a trick; an ingenious method; know-how; the knack (of doing something);
- 热门(rè mén): popular; hot; in vogue
*CL: Classifier/Measure Word