ガス栓[gasusen] gas tap
音栓[onsen] organ stop
給水栓[kyuusuisen] hydrant
共栓[tomosen] stopper
共同水栓[kyoudousuisen] common faucet

元栓[motosen] stopcock (gas, water)
塞栓[sokusen] embolus
耳栓[mimisen] earplug (for protection against noise or water)
消火栓[shoukasen] fire hydrant
水道栓[suidousen] hydrant

開け閉て[aketate] opening and shutting
開閉[kaihei] opening and shutting
基地閉鎖[kichiheisa] (military) base closing
自閉症[jiheishou] autism
腸閉塞[chouheisoku] intestinal obstruction

閉まる[shimaru] to be shut
店閉まい[misejimai] closing up shop
閉ざす[tozasu] to shut
閉じる[tojiru] to close (e.g. book, eyes, meeting, etc.)
閉込める[tojikomeru] to lock up