List: out-dated or obsolete kana usage

popular  obsolete reading  noun  noun (generic)  noun or participle taking the aux. verb する  intransitive verb 

• undressing, taking off one's clothes, stripping

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

• giant butterbur (Petasites japonicus), Japanese sweet coltsfoot

popular  obsolete reading  noun  noun (generic) 

• celebration, auspicious occasion

popular  obsolete reading  obsolete kanji  JLPT N5  usually written using kana alone  pronoun 

• where, what place
• how much (long, far), what extent

popular  obsolete reading  noun  noun (generic) 

• rubble, debris, wreckage, tiles and pebbles
• trash, rubbish

popular  obsolete reading  noun  noun (generic) 

• numerical inferiority, being outnumbered

popular  obsolete reading  dated term  noun  noun (generic) 

• mistress, kept woman, concubine

popular  obsolete reading  noun  noun (generic) 

• ticket

popular  obsolete reading  JLPT N4  noun  noun (generic)  music 

• piano (instrument)
• piano (dynamic)

popular  obsolete reading  onomatopoeic or mimetic word  adverb  adverb taking the と particle  noun or participle taking the aux. verb する  verb (generic)  noun (generic)  archaic 

• noisily (crowd of people talking), clamorously, in a hubbub, jabberingly, chatteringly, buzzingly
• loudly (laughing)