List: noun (generic)

popular  JLPT N1  noun  noun (generic) 

• ambition, aspiration
• sinister designs, treachery

popular  JLPT N3  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic) 

• riddle, puzzle, enigma, mystery
• enigmatic, mysterious

popular  noun  noun (generic) 

• barrier, obstacle, difficulty, hurdle, deadlock

popular  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic) 

• daily publication, daily issue

popular  noun  noun (generic) 

• New Year's card

popular  noun  noun (generic) 

• natto (fermented soybeans)

popular  JLPT N2  noun  noun (generic)  な adjective  adjective (generic)  noun taking the genitive case particle の  archaic 

• irony, sarcasm, cynicism, satire
• unexpected, different from what one expected, not as one had planned
• (only) surface, something superficial
• skin and bone, body

popular  JLPT N4  noun  noun (generic) 

• airfield, airport, aerodrome

popular  noun  noun (generic) 

• bedroom

popular  irregular okurigana  JLPT N2  noun  noun (generic) 

• the head, the foremost, beginning, the very front