一具[ichigu] one set
雨具[amagu] rain gear
化粧道具[keshoudougu] toilet set
家具[kagu] furniture
家具屋[kaguya] furniture store

絵具[enogu] colors
翫具[gangu] toy
器具[kigu] utensil
弓具[kyuugu] things used in archery
金具[kanagu] metal fittings or fixtures

アナログデジタル変換器[anarogudejitaruhenkanki] analog-digital converter
圧搾器[assakuki] compression
圧力調整器[atsuryokuchouseiki] pressure regulator
安全器[anzenki] safety device
安定器[anteiki] stabilizer

医療器械[iryoukikai] medical appliances
育雛器[ikusuuki] breeder
化学兵器[kagakuheiki] chemical weapons
化学兵器禁止条約[kagakuheikikinshijouyaku] chemical weapons ban treaty
加減抵抗器[kagenteikouki] rheostat