亜綱[akou] (biological) subclass
井戸綱[idozuna] well rope
井綱[izuna] well rope
横綱[yokozuna] yokozuna (grand champion)
綱曳き[tsunahiki] tug of war (orig. a form of divination to predict whether the year will be favourable or unfavourable)

綱紀[kouki] law and order
綱紀粛正[koukishukusei] eliminating corruption among government officials
綱渡り[tsunawatari] tightrope walking
綱要[kouyou] elements

天魚[amago] land-locked variety of red-spotted masu trout (Oncorhynchus masou ishikawae)
海鷂魚[ei] ray (fish)
斉魚[etsu] Japanese grenadier anchovy (Coilia nasus)
旗魚[kajiki] marlin
鶏魚[isagi] chicken grunt (species of fish, Parapristipoma trilineatum)

杜父魚[tofugyo] sculpin (any fish of family Cottidae, inc. the bullheads and the miller's-thumb)
堅魚[katsuo] skipjack tuna
魚網[gyomou] fishing net
魚屋[sakanaya] fish market
魚貝[gyokai] marine products