List: out-dated or obsolete kana usage

obsolete reading  usually written using kana alone  noun  noun (generic) 

• fin (e.g. of a fish)

obsolete reading  search-only kanji form  noun  noun (generic) 

• dawn, daybreak

irregular reading  obsolete reading  noun  noun (generic) 

• weight (for scales), counterweight

obsolete reading  noun  noun (generic)  obsolete term 

• separate matter
• different meaning
• special reason, special circumstances

obsolete reading  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic)  slang  video games  noun or participle taking the aux. verb する 

• peerless, unparalleled, unparallelled, matchless
• mowing down the enemy

obsolete reading  noun  noun (generic) 

• tough guy, wild one, fearless fighter

obsolete reading  usually written using kana alone  noun  noun (generic) 

• Japanese quince (Chaenomeles speciosa), flowering quince

obsolete reading  noun  noun (generic) 

• bokken, wooden sword

obsolete reading  rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• horned owl

obsolete reading  rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• bamboo screen, rattan blind
• bamboo mat (for rolling sushi)