List: out-dated or obsolete kana usage

popular  obsolete reading  JLPT N4  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic)  な adjective  noun (suffix) 

• distinction, difference, discrimination
• separate, different, another, extra
• exception, exclusion
• classified by, ranked by, according to

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

• shin, shank, lower leg

popular  obsolete reading  JLPT N2  godan verb  godan verb (archaic)  verb (generic)  intransitive verb 

• to incline toward, to slant, to lurch, to heel over, to be disposed to, to trend toward, to be prone to
• to go down (sun, moon), to sink
• to decline, to wane, to ebb, to fall away
• to tend (towards), to be inclined (to), to come around to (opinion, etc.)

popular  obsolete reading  astronomy  noun  noun (generic) 

• Milky Way, luminous band corresponding to the plane of the galaxy

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

• pumpkin (Cucurbita sp.), squash

popular  obsolete reading  JLPT N1  noun  noun (generic) 

• face
• surface
• mask (esp. a noh or kyogen mask)

popular  obsolete reading  rarely used kanji form  JLPT N1  godan verb  godan verb (archaic)  verb (generic)  intransitive verb 

• to step back, to move back, to retreat
• to withdraw (from the presence of a superior), to leave, to exit
• to resign, to retire, to quit
• to concede

popular  obsolete reading  rarely used kanji form  な adjective  adjective (generic)  noun  noun (generic) 

• greedy, avaricious, covetous

popular  obsolete reading  JLPT N2  usually written using kana alone  godan verb  godan verb (archaic)  verb (generic)  intransitive verb 

• to be closed, to be blocked, to be healed (e.g. wound), to be shut up
• to be clogged, to be plugged up
• to be occupied, to be taken (e.g. accommodation)

popular  obsolete reading  JLPT N1  noun  noun (generic)  noun or participle taking the aux. verb する  transitive verb  Buddhism 

• training, practice, discipline, study
• ascetic practices