庵室[anshitsu] hermit's cell
暗室[anshitsu] dark room
医務室[imushitsu] doctor's office
育児室[ikujishitsu] nursery
一室[isshitsu] one room

閲覧室[etsuranshitsu] inspection room
応接室[ousetsushitsu] drawing room
王室[oushitsu] royal family
温室[onshitsu] greenhouse
化粧室[keshoushitsu] toilet

ゴミ集積場[gomishuusekijou] village garbage collection point
欝積[usseki] accumulation (e.g. of emotions, grievances, etc.)
沖積[chuuseki] alluvial
沖積期[chuusekiki] alluvial period
沖積世[chuusekisei] alluvial epoch (i.e. the Holocene epoch)

沖積層[chuusekisou] alluvium
沖積土[chuusekido] alluvial soil
下積み[shitazumi] lowest social strata
求積[kyuuseki] mensuration
経路積分[keirosekibun] path integral (physics)